25349918139 has 64 divisors (see below), whose sum is σ = 46499604480. Its totient is φ = 13291102080.

The previous prime is 25349918137. The next prime is 25349918141. The reversal of 25349918139 is 93181994352.

25349918139 is a `hidden beast` number, since 2 + 5 + 3 + 499 + 18 + 139 = 666.

It is an interprime number because it is at equal distance from previous prime (25349918137) and next prime (25349918141).

It is not a de Polignac number, because 25349918139 - 2¹ = 25349918137 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25349918137) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 379429 + ... + 441209.

It is an arithmetic number, because the mean of its divisors is an integer number (726556320).

Almost surely, 2^25349918139 is an apocalyptic number.

25349918139 is a deficient number, since it is larger than the sum of its proper divisors (21149686341).

25349918139 is a wasteful number, since it uses less digits than its factorization.

25349918139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61977 (or 61971 counting only the distinct ones).

The product of its digits is 2099520, while the sum is 54.

The spelling of 25349918139 in words is "twenty-five billion, three hundred forty-nine million, nine hundred eighteen thousand, one hundred thirty-nine".