25357136540 has 12 divisors (see below), whose sum is σ = 53249986776. Its totient is φ = 10142854608.

The previous prime is 25357136533. The next prime is 25357136561. The reversal of 25357136540 is 4563175352.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 633928394 + ... + 633928433.

It is an arithmetic number, because the mean of its divisors is an integer number (4437498898).

Almost surely, 2^25357136540 is an apocalyptic number.

25357136540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25357136540 is an abundant number, since it is smaller than the sum of its proper divisors (27892850236).

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

25357136540 is a wasteful number, since it uses less digits than its factorization.

25357136540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1267856836 (or 1267856834 counting only the distinct ones).

The product of its (nonzero) digits is 378000, while the sum is 41.

The spelling of 25357136540 in words is "twenty-five billion, three hundred fifty-seven million, one hundred thirty-six thousand, five hundred forty".