12640270674065 has 32 divisors (see below), whose sum is σ = 15396576249600. Its totient is φ = 9961469164800.

The previous prime is 12640270674011. The next prime is 12640270674071. The reversal of 12640270674065 is 56047607204621.

It is not a de Polignac number, because 12640270674065 - 2²² = 12640266479761 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 50684846 + ... + 50933624.

It is an arithmetic number, because the mean of its divisors is an integer number (481143007800).

Almost surely, 2^{12640270674065} is an apocalyptic number.

It is an amenable number.

12640270674065 is a deficient number, since it is larger than the sum of its proper divisors (2756305575535).

12640270674065 is a wasteful number, since it uses less digits than its factorization.

12640270674065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 249497.

The product of its (nonzero) digits is 3386880, while the sum is 50.

Adding to 12640270674065 its reverse (56047607204621), we get a palindrome (68687877878686).

The spelling of 12640270674065 in words is "twelve trillion, six hundred forty billion, two hundred seventy million, six hundred seventy-four thousand, sixty-five".