25813929240 has 96 divisors (see below), whose sum is σ = 91522126800. Its totient is φ = 6257921280.

The previous prime is 25813929233. The next prime is 25813929263. The reversal of 25813929240 is 4292931852.

25813929240 is a `hidden beast` number, since 2 + 581 + 3 + 9 + 29 + 2 + 40 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3255375 + ... + 3263294.

Almost surely, 2^25813929240 is an apocalyptic number.

25813929240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25813929240 is an abundant number, since it is smaller than the sum of its proper divisors (65708197560).

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

25813929240 is a wasteful number, since it uses less digits than its factorization.

25813929240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6518697 (or 6518690 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 45.

The spelling of 25813929240 in words is "twenty-five billion, eight hundred thirteen million, nine hundred twenty-nine thousand, two hundred forty".