25287642627640 has 64 divisors (see below), whose sum is σ = 56929139150400. Its totient is φ = 10109379796992.

The previous prime is 25287642627623. The next prime is 25287642627673. The reversal of 25287642627640 is 4672624678252.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 636804106 + ... + 636843814.

It is an arithmetic number, because the mean of its divisors is an integer number (889517799225).

Almost surely, 2^{25287642627640} is an apocalyptic number.

25287642627640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25287642627640 is an abundant number, since it is smaller than the sum of its proper divisors (31641496522760).

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

25287642627640 is a wasteful number, since it uses less digits than its factorization.

25287642627640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48256 (or 48252 counting only the distinct ones).

The product of its (nonzero) digits is 108380160, while the sum is 61.

The spelling of 25287642627640 in words is "twenty-five trillion, two hundred eighty-seven billion, six hundred forty-two million, six hundred twenty-seven thousand, six hundred forty".