931680535574640 has 80 divisors (see below), whose sum is σ = 2888436855271968. Its totient is φ = 248428599164928.

The previous prime is 931680535574627. The next prime is 931680535574641. The reversal of 931680535574640 is 46475535086139.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×931680535574640² (a number of 31 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (931680535574641) 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, 149627329 + ... + 155729568.

Almost surely, 2^{931680535574640} is an apocalyptic number.

It is an amenable number.

931680535574640 is an abundant number, since it is smaller than the sum of its proper divisors (1956756319697328).

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

931680535574640 is a wasteful number, since it uses less digits than its factorization.

931680535574640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 305369626 (or 305369620 counting only the distinct ones).

The product of its (nonzero) digits is 326592000, while the sum is 66.

The spelling of 931680535574640 in words is "nine hundred thirty-one trillion, six hundred eighty billion, five hundred thirty-five million, five hundred seventy-four thousand, six hundred forty".