131862556809 has 24 divisors (see below), whose sum is σ = 191417878080. Its totient is φ = 87470821152.

The previous prime is 131862556807. The next prime is 131862556817. The reversal of 131862556809 is 908655268131.

131862556809 is a `hidden beast` number, since 1 + 3 + 1 + 8 + 6 + 2 + 556 + 80 + 9 = 666.

It is not a de Polignac number, because 131862556809 - 2¹ = 131862556807 is a prime.

It is not an unprimeable number, because it can be changed into a prime (131862556807) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2000827 + ... + 2065679.

It is an arithmetic number, because the mean of its divisors is an integer number (7975744920).

Almost surely, 2^131862556809 is an apocalyptic number.

It is an amenable number.

131862556809 is a deficient number, since it is larger than the sum of its proper divisors (59555321271).

131862556809 is a wasteful number, since it uses less digits than its factorization.

131862556809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65981 (or 65978 counting only the distinct ones).

The product of its (nonzero) digits is 3110400, while the sum is 54.

The spelling of 131862556809 in words is "one hundred thirty-one billion, eight hundred sixty-two million, five hundred fifty-six thousand, eight hundred nine".