25339894040 has 64 divisors (see below), whose sum is σ = 57778479360. Its totient is φ = 10000883200.

The previous prime is 25339894009. The next prime is 25339894057. The reversal of 25339894040 is 4049893352.

It is a super-2 number, since 2×25339894040² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1173017 + ... + 1194423.

It is an arithmetic number, because the mean of its divisors is an integer number (902788740).

Almost surely, 2^25339894040 is an apocalyptic number.

25339894040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25339894040 is an abundant number, since it is smaller than the sum of its proper divisors (32438585320).

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

25339894040 is a wasteful number, since it uses less digits than its factorization.

25339894040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21812 (or 21808 counting only the distinct ones).

The product of its (nonzero) digits is 933120, while the sum is 47.

The spelling of 25339894040 in words is "twenty-five billion, three hundred thirty-nine million, eight hundred ninety-four thousand, forty".