31141820015808 has 56 divisors (see below), whose sum is σ = 82420803286080. Its totient is φ = 10377490095360.

The previous prime is 31141820015717. The next prime is 31141820015809. The reversal of 31141820015808 is 80851002814113.

It is a self number, because there is not a number n which added to its sum of digits gives 31141820015808.

It is not an unprimeable number, because it can be changed into a prime (31141820015809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23707038 + ... + 24986141.

It is an arithmetic number, because the mean of its divisors is an integer number (1471800058680).

Almost surely, 2^{31141820015808} is an apocalyptic number.

It is an amenable number.

31141820015808 is an abundant number, since it is smaller than the sum of its proper divisors (51278983270272).

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

31141820015808 is a wasteful number, since it uses less digits than its factorization.

31141820015808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48696525 (or 48696515 counting only the distinct ones).

The product of its (nonzero) digits is 61440, while the sum is 42.

The spelling of 31141820015808 in words is "thirty-one trillion, one hundred forty-one billion, eight hundred twenty million, fifteen thousand, eight hundred eight".