131165704651 has 4 divisors (see below), whose sum is σ = 132166969704. Its totient is φ = 130164439600.

The previous prime is 131165704573. The next prime is 131165704667. The reversal of 131165704651 is 156407561131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 156407561131 = 24373 ⋅6417247.

It is a cyclic number.

It is not a de Polignac number, because 131165704651 - 2²¹ = 131163607499 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131165704051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 500632330 + ... + 500632591.

It is an arithmetic number, because the mean of its divisors is an integer number (33041742426).

Almost surely, 2^131165704651 is an apocalyptic number.

131165704651 is a deficient number, since it is larger than the sum of its proper divisors (1001265053).

131165704651 is a wasteful number, since it uses less digits than its factorization.

131165704651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1001265052.

The product of its (nonzero) digits is 75600, while the sum is 40.

The spelling of 131165704651 in words is "one hundred thirty-one billion, one hundred sixty-five million, seven hundred four thousand, six hundred fifty-one".