25371585040 has 40 divisors (see below), whose sum is σ = 59208275160. Its totient is φ = 10110898176.

The previous prime is 25371585017. The next prime is 25371585061. The reversal of 25371585040 is 4058517352.

It can be written as a sum of positive squares in 4 ways, for example, as 68956416 + 25302628624 = 8304^2 + 159068^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 25371584984 and 25371585002.

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, 567969 + ... + 611008.

It is an arithmetic number, because the mean of its divisors is an integer number (1480206879).

Almost surely, 2^25371585040 is an apocalyptic number.

25371585040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25371585040 is an abundant number, since it is smaller than the sum of its proper divisors (33836690120).

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

25371585040 is a wasteful number, since it uses less digits than its factorization.

25371585040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1179259 (or 1179253 counting only the distinct ones).

The product of its (nonzero) digits is 168000, while the sum is 40.

The spelling of 25371585040 in words is "twenty-five billion, three hundred seventy-one million, five hundred eighty-five thousand, forty".