25675213665 has 32 divisors (see below), whose sum is σ = 43252629120. Its totient is φ = 12969690624.

The previous prime is 25675213661. The next prime is 25675213687. The reversal of 25675213665 is 56631257652.

It is not a de Polignac number, because 25675213665 - 2² = 25675213661 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25675213661) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1673007 + ... + 1688283.

It is an arithmetic number, because the mean of its divisors is an integer number (1351644660).

Almost surely, 2^25675213665 is an apocalyptic number.

It is an amenable number.

25675213665 is a deficient number, since it is larger than the sum of its proper divisors (17577415455).

25675213665 is a wasteful number, since it uses less digits than its factorization.

25675213665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21201.

The product of its digits is 2268000, while the sum is 48.

The spelling of 25675213665 in words is "twenty-five billion, six hundred seventy-five million, two hundred thirteen thousand, six hundred sixty-five".