131191138866 has 16 divisors (see below), whose sum is σ = 262388973600. Its totient is φ = 43729263648.

The previous prime is 131191138853. The next prime is 131191138879. The reversal of 131191138866 is 668831191131.

It is an interprime number because it is at equal distance from previous prime (131191138853) and next prime (131191138879).

It is a super-2 number, since 2×131191138866² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3336 + ... + 512243.

It is an arithmetic number, because the mean of its divisors is an integer number (16399310850).

Almost surely, 2^131191138866 is an apocalyptic number.

131191138866 is an abundant number, since it is smaller than the sum of its proper divisors (131197834734).

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

131191138866 is a wasteful number, since it uses less digits than its factorization.

131191138866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 557993.

The product of its digits is 186624, while the sum is 48.

The spelling of 131191138866 in words is "one hundred thirty-one billion, one hundred ninety-one million, one hundred thirty-eight thousand, eight hundred sixty-six".