25640514322465 has 16 divisors (see below), whose sum is σ = 35981904486528. Its totient is φ = 17173181684736.

The previous prime is 25640514322427. The next prime is 25640514322483. The reversal of 25640514322465 is 56422341504652.

It is a de Polignac number, because none of the positive numbers 2^k-25640514322465 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8518441792 + ... + 8518444801.

It is an arithmetic number, because the mean of its divisors is an integer number (2248869030408).

Almost surely, 2^{25640514322465} is an apocalyptic number.

It is an amenable number.

25640514322465 is a deficient number, since it is larger than the sum of its proper divisors (10341390164063).

25640514322465 is a wasteful number, since it uses less digits than its factorization.

25640514322465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17036886648.

The product of its (nonzero) digits is 6912000, while the sum is 49.

The spelling of 25640514322465 in words is "twenty-five trillion, six hundred forty billion, five hundred fourteen million, three hundred twenty-two thousand, four hundred sixty-five".