31486305643856 has 40 divisors (see below), whose sum is σ = 69720060636480. Its totient is φ = 13494056696064.

The previous prime is 31486305643847. The next prime is 31486305643909. The reversal of 31486305643856 is 65834650368413.

It is a congruent number.

It is an unprimeable number.

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, 22870115 + ... + 24207741.

It is an arithmetic number, because the mean of its divisors is an integer number (1743001515912).

Almost surely, 2^{31486305643856} is an apocalyptic number.

It is an amenable number.

31486305643856 is an abundant number, since it is smaller than the sum of its proper divisors (38233754992624).

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

31486305643856 is a wasteful number, since it uses less digits than its factorization.

31486305643856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1547811 (or 1547805 counting only the distinct ones).

The product of its (nonzero) digits is 149299200, while the sum is 62.

The spelling of 31486305643856 in words is "thirty-one trillion, four hundred eighty-six billion, three hundred five million, six hundred forty-three thousand, eight hundred fifty-six".