31530316163640 has 64 divisors (see below), whose sum is σ = 108103941135360. Its totient is φ = 7206929408640.

The previous prime is 31530316163617. The next prime is 31530316163701. The reversal of 31530316163640 is 4636161303513.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 31530316163592 and 31530316163601.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18768044496 + ... + 18768046175.

It is an arithmetic number, because the mean of its divisors is an integer number (1689124080240).

Almost surely, 2^{31530316163640} is an apocalyptic number.

31530316163640 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31530316163640 is an abundant number, since it is smaller than the sum of its proper divisors (76573624971720).

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

31530316163640 is a wasteful number, since it uses less digits than its factorization.

31530316163640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37536090692 (or 37536090688 counting only the distinct ones).

The product of its (nonzero) digits is 349920, while the sum is 42.

The spelling of 31530316163640 in words is "thirty-one trillion, five hundred thirty billion, three hundred sixteen million, one hundred sixty-three thousand, six hundred forty".