25317390100 has 36 divisors (see below), whose sum is σ = 55424944764. Its totient is φ = 10037332480.

The previous prime is 25317390061. The next prime is 25317390101. The reversal of 25317390100 is 109371352.

It can be written as a sum of positive squares in 6 ways, for example, as 4014236164 + 21303153936 = 63358^2 + 145956^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25317390101) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1108939 + ... + 1131538.

It is an arithmetic number, because the mean of its divisors is an integer number (1539581799).

Almost surely, 2^25317390100 is an apocalyptic number.

25317390100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25317390100 is an abundant number, since it is smaller than the sum of its proper divisors (30107554664).

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

25317390100 is a wasteful number, since it uses less digits than its factorization.

25317390100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2240604 (or 2240597 counting only the distinct ones).

The product of its (nonzero) digits is 5670, while the sum is 31.

The spelling of 25317390100 in words is "twenty-five billion, three hundred seventeen million, three hundred ninety thousand, one hundred".