25587546320 has 80 divisors (see below), whose sum is σ = 70183031808. Its totient is φ = 8489871360.

The previous prime is 25587546293. The next prime is 25587546323. The reversal of 25587546320 is 2364578552.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25587546323) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 719609 + ... + 754328.

Almost surely, 2^25587546320 is an apocalyptic number.

25587546320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25587546320 is an abundant number, since it is smaller than the sum of its proper divisors (44595485488).

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

25587546320 is a wasteful number, since it uses less digits than its factorization.

25587546320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1473988 (or 1473982 counting only the distinct ones).

The product of its (nonzero) digits is 2016000, while the sum is 47.

The spelling of 25587546320 in words is "twenty-five billion, five hundred eighty-seven million, five hundred forty-six thousand, three hundred twenty".