131207021664 has 24 divisors (see below), whose sum is σ = 344418432120. Its totient is φ = 43735673856.

The previous prime is 131207021651. The next prime is 131207021681. The reversal of 131207021664 is 466120702131.

It is a tau number, because it is divible by the number of its divisors (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 683369809 + ... + 683370000.

It is an arithmetic number, because the mean of its divisors is an integer number (14350768005).

Almost surely, 2^131207021664 is an apocalyptic number.

It is an amenable number.

131207021664 is an abundant number, since it is smaller than the sum of its proper divisors (213211410456).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

131207021664 is a wasteful number, since it uses less digits than its factorization.

131207021664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1366739822 (or 1366739814 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 33.

Adding to 131207021664 its reverse (466120702131), we get a palindrome (597327723795).

The spelling of 131207021664 in words is "one hundred thirty-one billion, two hundred seven million, twenty-one thousand, six hundred sixty-four".