25171220604 has 24 divisors (see below), whose sum is σ = 58750489728. Its totient is φ = 8387886640.

The previous prime is 25171220537. The next prime is 25171220617. The reversal of 25171220604 is 40602217152.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 273192 + ... + 353519.

It is an arithmetic number, because the mean of its divisors is an integer number (2447937072).

Almost surely, 2^25171220604 is an apocalyptic number.

It is an amenable number.

25171220604 is an abundant number, since it is smaller than the sum of its proper divisors (33579269124).

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

25171220604 is a wasteful number, since it uses less digits than its factorization.

25171220604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 630065 (or 630063 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 30.

Adding to 25171220604 its reverse (40602217152), we get a palindrome (65773437756).

The spelling of 25171220604 in words is "twenty-five billion, one hundred seventy-one million, two hundred twenty thousand, six hundred four".