25530139040 has 48 divisors (see below), whose sum is σ = 68931378432. Its totient is φ = 8753190144.

The previous prime is 25530139021. The next prime is 25530139069. The reversal of 25530139040 is 4093103552.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a junction number, because it is equal to n+sod(n) for n = 25530138988 and 25530139006.

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, 11396264 + ... + 11398503.

It is an arithmetic number, because the mean of its divisors is an integer number (1436070384).

Almost surely, 2^25530139040 is an apocalyptic number.

25530139040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25530139040 is an abundant number, since it is smaller than the sum of its proper divisors (43401239392).

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

25530139040 is a wasteful number, since it uses less digits than its factorization.

25530139040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22794789 (or 22794781 counting only the distinct ones).

The product of its (nonzero) digits is 16200, while the sum is 32.

The spelling of 25530139040 in words is "twenty-five billion, five hundred thirty million, one hundred thirty-nine thousand, forty".