131329645651 has 4 divisors (see below), whose sum is σ = 131743935072. Its totient is φ = 130915356232.

The previous prime is 131329645627. The next prime is 131329645661. The reversal of 131329645651 is 156546923131.

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-131329645651 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131329645661) 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, 207144235 + ... + 207144868.

It is an arithmetic number, because the mean of its divisors is an integer number (32935983768).

Almost surely, 2^131329645651 is an apocalyptic number.

131329645651 is a deficient number, since it is larger than the sum of its proper divisors (414289421).

131329645651 is an equidigital number, since it uses as much as digits as its factorization.

131329645651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 414289420.

The product of its digits is 583200, while the sum is 46.

The spelling of 131329645651 in words is "one hundred thirty-one billion, three hundred twenty-nine million, six hundred forty-five thousand, six hundred fifty-one".