154489444984451 has 4 divisors (see below), whose sum is σ = 154540753338504. Its totient is φ = 154438136630400.

The previous prime is 154489444984379. The next prime is 154489444984477.

154489444984451 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 154489444984451 - 2²⁶ = 154489377875587 is a prime.

It is a super-2 number, since 2×154489444984451² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (154489444984481) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25654172510 + ... + 25654178531.

It is an arithmetic number, because the mean of its divisors is an integer number (38635188334626).

Almost surely, 2^{154489444984451} is an apocalyptic number.

154489444984451 is a deficient number, since it is larger than the sum of its proper divisors (51308354053).

154489444984451 is an equidigital number, since it uses as much as digits as its factorization.

154489444984451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51308354052.

The product of its digits is 2123366400, while the sum is 74.

The spelling of 154489444984451 in words is "one hundred fifty-four trillion, four hundred eighty-nine billion, four hundred forty-four million, nine hundred eighty-four thousand, four hundred fifty-one".