25641652620 has 96 divisors (see below), whose sum is σ = 72254036736. Its totient is φ = 6794323200.

The previous prime is 25641652583. The next prime is 25641652633. The reversal of 25641652620 is 2625614652.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10392627 + ... + 10395093.

It is an arithmetic number, because the mean of its divisors is an integer number (752646216).

Almost surely, 2^25641652620 is an apocalyptic number.

25641652620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25641652620 is an abundant number, since it is smaller than the sum of its proper divisors (46612384116).

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

25641652620 is a wasteful number, since it uses less digits than its factorization.

25641652620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3511 (or 3509 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 39.

The spelling of 25641652620 in words is "twenty-five billion, six hundred forty-one million, six hundred fifty-two thousand, six hundred twenty".