25397310212 has 6 divisors (see below), whose sum is σ = 44445292878. Its totient is φ = 12698655104.

The previous prime is 25397310161. The next prime is 25397310221. The reversal of 25397310212 is 21201379352.

It can be written as a sum of positive squares in only one way, i.e., 13434200836 + 11963109376 = 115906^2 + 109376^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3174663773 + ... + 3174663780.

It is an arithmetic number, because the mean of its divisors is an integer number (7407548813).

Almost surely, 2^25397310212 is an apocalyptic number.

It is an amenable number.

25397310212 is a deficient number, since it is larger than the sum of its proper divisors (19047982666).

25397310212 is a wasteful number, since it uses less digits than its factorization.

25397310212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6349327557 (or 6349327555 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 35.

Adding to 25397310212 its reverse (21201379352), we get a palindrome (46598689564).

The spelling of 25397310212 in words is "twenty-five billion, three hundred ninety-seven million, three hundred ten thousand, two hundred twelve".