131988997722 has 16 divisors (see below), whose sum is σ = 264502808640. Its totient is φ = 43908863712.

The previous prime is 131988997687. The next prime is 131988997801. The reversal of 131988997722 is 227799889131.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 21863947 + ... + 21869982.

It is an arithmetic number, because the mean of its divisors is an integer number (16531425540).

Almost surely, 2^131988997722 is an apocalyptic number.

131988997722 is an abundant number, since it is smaller than the sum of its proper divisors (132513810918).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

131988997722 is a wasteful number, since it uses less digits than its factorization.

131988997722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43734437.

The product of its digits is 27433728, while the sum is 66.

The spelling of 131988997722 in words is "one hundred thirty-one billion, nine hundred eighty-eight million, nine hundred ninety-seven thousand, seven hundred twenty-two".