131577913921 has 8 divisors (see below), whose sum is σ = 133400162304. Its totient is φ = 129756201120.

The previous prime is 131577913867. The next prime is 131577913927. The reversal of 131577913921 is 129319775131.

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

It is a cyclic number.

It is not a de Polignac number, because 131577913921 - 2¹³ = 131577905729 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131577913927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 374100 + ... + 634906.

It is an arithmetic number, because the mean of its divisors is an integer number (16675020288).

Almost surely, 2^131577913921 is an apocalyptic number.

It is an amenable number.

131577913921 is a deficient number, since it is larger than the sum of its proper divisors (1822248383).

131577913921 is an equidigital number, since it uses as much as digits as its factorization.

131577913921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 267791.

The product of its digits is 357210, while the sum is 49.

The spelling of 131577913921 in words is "one hundred thirty-one billion, five hundred seventy-seven million, nine hundred thirteen thousand, nine hundred twenty-one".