25155132516 has 72 divisors (see below), whose sum is σ = 64008008064. Its totient is φ = 8329608000.

The previous prime is 25155132491. The next prime is 25155132523. The reversal of 25155132516 is 61523155152.

25155132516 is a `hidden beast` number, since 2 + 5 + 1 + 5 + 5 + 132 + 516 = 666.

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

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, 5323731 + ... + 5328453.

It is an arithmetic number, because the mean of its divisors is an integer number (889000112).

Almost surely, 2^25155132516 is an apocalyptic number.

It is an amenable number.

25155132516 is an abundant number, since it is smaller than the sum of its proper divisors (38852875548).

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

25155132516 is a wasteful number, since it uses less digits than its factorization.

25155132516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5681 (or 5676 counting only the distinct ones).

The product of its digits is 45000, while the sum is 36.

Adding to 25155132516 its reverse (61523155152), we get a palindrome (86678287668).

The spelling of 25155132516 in words is "twenty-five billion, one hundred fifty-five million, one hundred thirty-two thousand, five hundred sixteen".