25865875780 has 48 divisors (see below), whose sum is σ = 55052570160. Its totient is φ = 10207232000.

The previous prime is 25865875681. The next prime is 25865875787. The reversal of 25865875780 is 8757856852.

It can be written as a sum of positive squares in 8 ways, for example, as 7939879236 + 17925996544 = 89106^2 + 133888^2 .

It is not an unprimeable number, because it can be changed into a prime (25865875787) 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, 544836 + ... + 590404.

It is an arithmetic number, because the mean of its divisors is an integer number (1146928545).

Almost surely, 2^25865875780 is an apocalyptic number.

25865875780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25865875780 is an abundant number, since it is smaller than the sum of its proper divisors (29186694380).

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

25865875780 is a wasteful number, since it uses less digits than its factorization.

25865875780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45960 (or 45958 counting only the distinct ones).

The product of its (nonzero) digits is 37632000, while the sum is 61.

The spelling of 25865875780 in words is "twenty-five billion, eight hundred sixty-five million, eight hundred seventy-five thousand, seven hundred eighty".