25663127256156 has 96 divisors (see below), whose sum is σ = 67357044518400. Its totient is φ = 7545570253056.

The previous prime is 25663127256149. The next prime is 25663127256181. The reversal of 25663127256156 is 65165272136652.

It is a happy number.

It is a super-2 number, since 2×25663127256156² (a number of 28 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 25663127256096 and 25663127256105.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 104295 + ... + 7164993.

It is an arithmetic number, because the mean of its divisors is an integer number (701635880400).

Almost surely, 2^{25663127256156} is an apocalyptic number.

25663127256156 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25663127256156, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33678522259200).

25663127256156 is an abundant number, since it is smaller than the sum of its proper divisors (41693917262244).

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

25663127256156 is a wasteful number, since it uses less digits than its factorization.

25663127256156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7061755 (or 7061753 counting only the distinct ones).

The product of its digits is 27216000, while the sum is 57.

The spelling of 25663127256156 in words is "twenty-five trillion, six hundred sixty-three billion, one hundred twenty-seven million, two hundred fifty-six thousand, one hundred fifty-six".