23154491556 has 81 divisors (see below), whose sum is σ = 68104028811. Its totient is φ = 6613743024.

The previous prime is 23154491539. The next prime is 23154491599. The reversal of 23154491556 is 65519445132.

It is a happy number.

The square root of 23154491556 is 152166.

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

23154491556 is a `hidden beast` number, since 2 + 3 + 1 + 5 + 4 + 4 + 91 + 556 = 666.

It is a super-2 number, since 2×23154491556² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

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 26 ways as a sum of consecutive naturals, for example, 6389161 + ... + 6392783.

Almost surely, 2^23154491556 is an apocalyptic number.

23154491556 is the 152166-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23154491556

23154491556 is an abundant number, since it is smaller than the sum of its proper divisors (44949537255).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

23154491556 is an equidigital number, since it uses as much as digits as its factorization.

23154491556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7270 (or 3635 counting only the distinct ones).

The product of its digits is 648000, while the sum is 45.

The spelling of 23154491556 in words is "twenty-three billion, one hundred fifty-four million, four hundred ninety-one thousand, five hundred fifty-six".