25515360738 has 96 divisors (see below), whose sum is σ = 64351003392. Its totient is φ = 7155993600.

The previous prime is 25515360721. The next prime is 25515360757. The reversal of 25515360738 is 83706351552.

25515360738 is a `hidden beast` number, since 2 + 5 + 5 + 1 + 5 + 3 + 607 + 38 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 25515360693 and 25515360702.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2078298 + ... + 2090538.

It is an arithmetic number, because the mean of its divisors is an integer number (670322952).

Almost surely, 2^25515360738 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25515360738, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32175501696).

25515360738 is an abundant number, since it is smaller than the sum of its proper divisors (38835642654).

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

25515360738 is a wasteful number, since it uses less digits than its factorization.

25515360738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12560 (or 12557 counting only the distinct ones).

The product of its (nonzero) digits is 756000, while the sum is 45.

The spelling of 25515360738 in words is "twenty-five billion, five hundred fifteen million, three hundred sixty thousand, seven hundred thirty-eight".