131161038615 has 128 divisors (see below), whose sum is σ = 244868832000. Its totient is φ = 66523742208.

The previous prime is 131161038607. The next prime is 131161038641. The reversal of 131161038615 is 516830161131.

131161038615 is a `hidden beast` number, since 1 + 3 + 1 + 1 + 6 + 1 + 0 + 38 + 615 = 666.

It is not a de Polignac number, because 131161038615 - 2³ = 131161038607 is a prime.

It is a super-2 number, since 2×131161038615² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 131161038615.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 117422037 + ... + 117423153.

It is an arithmetic number, because the mean of its divisors is an integer number (1913037750).

Almost surely, 2^131161038615 is an apocalyptic number.

131161038615 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

131161038615 is a deficient number, since it is larger than the sum of its proper divisors (113707793385).

131161038615 is a wasteful number, since it uses less digits than its factorization.

131161038615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1586 (or 1580 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 36.

Adding to 131161038615 its reverse (516830161131), we get a palindrome (647991199746).

The spelling of 131161038615 in words is "one hundred thirty-one billion, one hundred sixty-one million, thirty-eight thousand, six hundred fifteen".