131836515840 has 160 divisors (see below), whose sum is σ = 468294536160. Its totient is φ = 35156385792.

The previous prime is 131836515817. The next prime is 131836515841. The reversal of 131836515840 is 48515638131.

131836515840 is a `hidden beast` number, since 1 + 3 + 1 + 8 + 3 + 65 + 1 + 584 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (160).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131836515841) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 884559 + ... + 1022798.

It is an arithmetic number, because the mean of its divisors is an integer number (2926840851).

Almost surely, 2^131836515840 is an apocalyptic number.

131836515840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131836515840 is an abundant number, since it is smaller than the sum of its proper divisors (336458020320).

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

131836515840 is an equidigital number, since it uses as much as digits as its factorization.

131836515840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1907389 (or 1907367 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 45.

The spelling of 131836515840 in words is "one hundred thirty-one billion, eight hundred thirty-six million, five hundred fifteen thousand, eight hundred forty".