25252721156 has 12 divisors (see below), whose sum is σ = 47591666892. Its totient is φ = 11655102048.

The previous prime is 25252721147. The next prime is 25252721231. The reversal of 25252721156 is 65112725252.

It can be written as a sum of positive squares in 2 ways, for example, as 4956160000 + 20296561156 = 70400^2 + 142466^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 242814575 + ... + 242814678.

It is an arithmetic number, because the mean of its divisors is an integer number (3965972241).

Almost surely, 2^25252721156 is an apocalyptic number.

25252721156 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

25252721156 is a deficient number, since it is larger than the sum of its proper divisors (22338945736).

25252721156 is a wasteful number, since it uses less digits than its factorization.

25252721156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 485629270 (or 485629268 counting only the distinct ones).

The product of its digits is 84000, while the sum is 38.

The spelling of 25252721156 in words is "twenty-five billion, two hundred fifty-two million, seven hundred twenty-one thousand, one hundred fifty-six".