25906433928 has 64 divisors (see below), whose sum is σ = 65478067200. Its totient is φ = 8540761920.

The previous prime is 25906433911. The next prime is 25906434007. The reversal of 25906433928 is 82933460952.

It is a happy number.

It is a super-2 number, since 2×25906433928² (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 15 ways as a sum of consecutive naturals, for example, 2067763 + ... + 2080253.

It is an arithmetic number, because the mean of its divisors is an integer number (1023094800).

Almost surely, 2^25906433928 is an apocalyptic number.

It is an amenable number.

25906433928 is an abundant number, since it is smaller than the sum of its proper divisors (39571633272).

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

25906433928 is a wasteful number, since it uses less digits than its factorization.

25906433928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13442 (or 13438 counting only the distinct ones).

The product of its (nonzero) digits is 2799360, while the sum is 51.

The spelling of 25906433928 in words is "twenty-five billion, nine hundred six million, four hundred thirty-three thousand, nine hundred twenty-eight".