25600635420 has 24 divisors (see below), whose sum is σ = 71681779344. Its totient is φ = 6826836096.

The previous prime is 25600635413. The next prime is 25600635443. The reversal of 25600635420 is 2453600652.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 213338569 + ... + 213338688.

It is an arithmetic number, because the mean of its divisors is an integer number (2986740806).

Almost surely, 2^25600635420 is an apocalyptic number.

25600635420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25600635420 is an abundant number, since it is smaller than the sum of its proper divisors (46081143924).

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

25600635420 is a wasteful number, since it uses less digits than its factorization.

25600635420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 426677269 (or 426677267 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 33.

The spelling of 25600635420 in words is "twenty-five billion, six hundred million, six hundred thirty-five thousand, four hundred twenty".