131507705640 has 64 divisors (see below), whose sum is σ = 394847732160. Its totient is φ = 35039866880.

The previous prime is 131507705639. The next prime is 131507705663. The reversal of 131507705640 is 46507705131.

It is a super-3 number, since 3×131507705640³ (a number of 34 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 304206 + ... + 596285.

It is an arithmetic number, because the mean of its divisors is an integer number (6169495815).

Almost surely, 2^131507705640 is an apocalyptic number.

131507705640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131507705640 is an abundant number, since it is smaller than the sum of its proper divisors (263340026520).

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

131507705640 is a wasteful number, since it uses less digits than its factorization.

131507705640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 901722 (or 901718 counting only the distinct ones).

The product of its (nonzero) digits is 88200, while the sum is 39.

The spelling of 131507705640 in words is "one hundred thirty-one billion, five hundred seven million, seven hundred five thousand, six hundred forty".