25664407626 has 64 divisors (see below), whose sum is σ = 60353629056. Its totient is φ = 7172755200.

The previous prime is 25664407591. The next prime is 25664407631. The reversal of 25664407626 is 62670446652.

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, 1049256 + ... + 1073436.

It is an arithmetic number, because the mean of its divisors is an integer number (943025454).

Almost surely, 2^25664407626 is an apocalyptic number.

25664407626 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 25664407626, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30176814528).

25664407626 is an abundant number, since it is smaller than the sum of its proper divisors (34689221430).

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

25664407626 is a wasteful number, since it uses less digits than its factorization.

25664407626 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25447.

The product of its (nonzero) digits is 2903040, while the sum is 48.

The spelling of 25664407626 in words is "twenty-five billion, six hundred sixty-four million, four hundred seven thousand, six hundred twenty-six".