31402161868 has 48 divisors (see below), whose sum is σ = 68583610368. Its totient is φ = 12222144000.

The previous prime is 31402161803. The next prime is 31402161929. The reversal of 31402161868 is 86816120413.

It is a self number, because there is not a number n which added to its sum of digits gives 31402161868.

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, 253788 + ... + 356668.

It is an arithmetic number, because the mean of its divisors is an integer number (1428825216).

Almost surely, 2^31402161868 is an apocalyptic number.

It is an amenable number.

31402161868 is an abundant number, since it is smaller than the sum of its proper divisors (37181448500).

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

31402161868 is a wasteful number, since it uses less digits than its factorization.

31402161868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103894 (or 103892 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 40.

The spelling of 31402161868 in words is "thirty-one billion, four hundred two million, one hundred sixty-one thousand, eight hundred sixty-eight".