25397906764 has 24 divisors (see below), whose sum is σ = 46052511120. Its totient is φ = 12248169024.

The previous prime is 25397906761. The next prime is 25397906773. The reversal of 25397906764 is 46760979352.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 25397906699 and 25397906708.

It is not an unprimeable number, because it can be changed into a prime (25397906761) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1002759 + ... + 1027774.

It is an arithmetic number, because the mean of its divisors is an integer number (1918854630).

Almost surely, 2^25397906764 is an apocalyptic number.

It is an amenable number.

25397906764 is a deficient number, since it is larger than the sum of its proper divisors (20654604356).

25397906764 is a wasteful number, since it uses less digits than its factorization.

25397906764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2030649 (or 2030647 counting only the distinct ones).

The product of its (nonzero) digits is 17146080, while the sum is 58.

The spelling of 25397906764 in words is "twenty-five billion, three hundred ninety-seven million, nine hundred six thousand, seven hundred sixty-four".