25655534020 has 48 divisors (see below), whose sum is σ = 57071973168. Its totient is φ = 9654128640.

The previous prime is 25655533973. The next prime is 25655534029. The reversal of 25655534020 is 2043555652.

It can be written as a sum of positive squares in 8 ways, for example, as 1909340416 + 23746193604 = 43696^2 + 154098^2 .

It is not an unprimeable number, because it can be changed into a prime (25655534029) 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, 779824 + ... + 812056.

It is an arithmetic number, because the mean of its divisors is an integer number (1188999441).

Almost surely, 2^25655534020 is an apocalyptic number.

25655534020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25655534020 is an abundant number, since it is smaller than the sum of its proper divisors (31416439148).

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

25655534020 is a wasteful number, since it uses less digits than its factorization.

25655534020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34600 (or 34598 counting only the distinct ones).

The product of its (nonzero) digits is 180000, while the sum is 37.

The spelling of 25655534020 in words is "twenty-five billion, six hundred fifty-five million, five hundred thirty-four thousand, twenty".