154415203849 has 3 divisors (see below), whose sum is σ = 154415596807. Its totient is φ = 154414810892.

The previous prime is 154415203759. The next prime is 154415203883. The reversal of 154415203849 is 948302514451.

The square root of 154415203849 is 392957.

It is a perfect power (a square), and thus also a powerful number.

154415203849 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 948302514451 = 630281 ⋅1504571.

It can be written as a sum of positive squares in only one way, i.e., 25726556025 + 128688647824 = 160395^2 + 358732^2 .

It is not a de Polignac number, because 154415203849 - 2³⁷ = 16976250377 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 154415203799 and 154415203808.

It is not an unprimeable number, because it can be changed into a prime (154415203049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 196479 + ... + 589435.

Almost surely, 2^154415203849 is an apocalyptic number.

154415203849 is the 392957-th square number.

154415203849 is the 196479-th centered octagonal number.

It is an amenable number.

154415203849 is a deficient number, since it is larger than the sum of its proper divisors (392958).

154415203849 is an frugal number, since it uses more digits than its factorization.

154415203849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 785914 (or 392957 counting only the distinct ones).

The product of its (nonzero) digits is 691200, while the sum is 46.

The spelling of 154415203849 in words is "one hundred fifty-four billion, four hundred fifteen million, two hundred three thousand, eight hundred forty-nine".