131581916372 has 6 divisors (see below), whose sum is σ = 230268353658. Its totient is φ = 65790958184.

The previous prime is 131581916371. The next prime is 131581916383. The reversal of 131581916372 is 273619185131.

It can be written as a sum of positive squares in only one way, i.e., 122245332496 + 9336583876 = 349636^2 + 96626^2 .

It is a super-2 number, since 2×131581916372² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131581916371) 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 as a sum of consecutive naturals, namely, 16447739543 + ... + 16447739550.

It is an arithmetic number, because the mean of its divisors is an integer number (38378058943).

Almost surely, 2^131581916372 is an apocalyptic number.

It is an amenable number.

131581916372 is a deficient number, since it is larger than the sum of its proper divisors (98686437286).

131581916372 is a wasteful number, since it uses less digits than its factorization.

131581916372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32895479097 (or 32895479095 counting only the distinct ones).

The product of its digits is 272160, while the sum is 47.

The spelling of 131581916372 in words is "one hundred thirty-one billion, five hundred eighty-one million, nine hundred sixteen thousand, three hundred seventy-two".