154954811449 has 9 divisors (see below), whose sum is σ = 159270938127. Its totient is φ = 150752672424.

The previous prime is 154954811381. The next prime is 154954811497. The reversal of 154954811449 is 944118459451.

The square root of 154954811449 is 393643.

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

It can be written as a sum of positive squares in only one way, i.e., 138655693225 + 16299118224 = 372365^2 + 127668^2 .

It is not a de Polignac number, because 154954811449 - 2⁷ = 154954811321 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 154954811449.

It is not an unprimeable number, because it can be changed into a prime (154954811549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 14559472 + ... + 14570110.

It is an arithmetic number, because the mean of its divisors is an integer number (17696770903).

Almost surely, 2^154954811449 is an apocalyptic number.

154954811449 is the 393643-rd square number.

154954811449 is the 196822-nd centered octagonal number.

It is an amenable number.

154954811449 is a deficient number, since it is larger than the sum of its proper divisors (4316126678).

154954811449 is an frugal number, since it uses more digits than its factorization.

154954811449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21352 (or 10676 counting only the distinct ones).

The product of its digits is 4147200, while the sum is 55.

The spelling of 154954811449 in words is "one hundred fifty-four billion, nine hundred fifty-four million, eight hundred eleven thousand, four hundred forty-nine".