131644384651 has 4 divisors (see below), whose sum is σ = 141770875792. Its totient is φ = 121517893512.

The previous prime is 131644384607. The next prime is 131644384657. The reversal of 131644384651 is 156483446131.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131644384651 is a prime.

It is not an unprimeable number, because it can be changed into a prime (131644384657) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5063245551 + ... + 5063245576.

It is an arithmetic number, because the mean of its divisors is an integer number (35442718948).

Almost surely, 2^131644384651 is an apocalyptic number.

131644384651 is a deficient number, since it is larger than the sum of its proper divisors (10126491141).

131644384651 is a wasteful number, since it uses less digits than its factorization.

131644384651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10126491140.

The product of its digits is 829440, while the sum is 46.

The spelling of 131644384651 in words is "one hundred thirty-one billion, six hundred forty-four million, three hundred eighty-four thousand, six hundred fifty-one".