25505040102 has 32 divisors (see below), whose sum is σ = 51183525888. Its totient is φ = 8472808896.

The previous prime is 25505040091. The next prime is 25505040179. The reversal of 25505040102 is 20104050552.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3542218 + ... + 3549410.

It is an arithmetic number, because the mean of its divisors is an integer number (1599485184).

Almost surely, 2^25505040102 is an apocalyptic number.

25505040102 is an abundant number, since it is smaller than the sum of its proper divisors (25678485786).

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

25505040102 is a wasteful number, since it uses less digits than its factorization.

25505040102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9124.

The product of its (nonzero) digits is 2000, while the sum is 24.

Adding to 25505040102 its reverse (20104050552), we get a palindrome (45609090654).

The spelling of 25505040102 in words is "twenty-five billion, five hundred five million, forty thousand, one hundred two".