25151515164 has 72 divisors (see below), whose sum is σ = 70860338640. Its totient is φ = 7475369472.

The previous prime is 25151515159. The next prime is 25151515219. The reversal of 25151515164 is 46151515152.

It is a Harshad number since it is a multiple of its sum of digits (36).

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, 1069879 + ... + 1093134.

It is an arithmetic number, because the mean of its divisors is an integer number (984171370).

Almost surely, 2^25151515164 is an apocalyptic number.

It is an amenable number.

25151515164 is an abundant number, since it is smaller than the sum of its proper divisors (45708823476).

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

25151515164 is a wasteful number, since it uses less digits than its factorization.

25151515164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2163059 (or 2163054 counting only the distinct ones).

The product of its digits is 30000, while the sum is 36.

The spelling of 25151515164 in words is "twenty-five billion, one hundred fifty-one million, five hundred fifteen thousand, one hundred sixty-four".