131628977831 has 8 divisors (see below), whose sum is σ = 143347029840. Its totient is φ = 120138460992.

The previous prime is 131628977819. The next prime is 131628977839. The reversal of 131628977831 is 138779826131.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131628977831 is a prime.

It is a super-2 number, since 2×131628977831² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131628977839) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56882585 + ... + 56884898.

It is an arithmetic number, because the mean of its divisors is an integer number (17918378730).

Almost surely, 2^131628977831 is an apocalyptic number.

131628977831 is a deficient number, since it is larger than the sum of its proper divisors (11718052009).

131628977831 is a wasteful number, since it uses less digits than its factorization.

131628977831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113767585.

The product of its digits is 3048192, while the sum is 56.

The spelling of 131628977831 in words is "one hundred thirty-one billion, six hundred twenty-eight million, nine hundred seventy-seven thousand, eight hundred thirty-one".