31408377781516 has 12 divisors (see below), whose sum is σ = 55061259823080. Its totient is φ = 15676589260640.

The previous prime is 31408377781507. The next prime is 31408377781531. The reversal of 31408377781516 is 61518777380413.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6899904970 + ... + 6899909521.

It is an arithmetic number, because the mean of its divisors is an integer number (4588438318590).

Almost surely, 2^{31408377781516} is an apocalyptic number.

It is an amenable number.

31408377781516 is a deficient number, since it is larger than the sum of its proper divisors (23652882041564).

31408377781516 is a wasteful number, since it uses less digits than its factorization.

31408377781516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13799815064 (or 13799815062 counting only the distinct ones).

The product of its (nonzero) digits is 23708160, while the sum is 61.

The spelling of 31408377781516 in words is "thirty-one trillion, four hundred eight billion, three hundred seventy-seven million, seven hundred eighty-one thousand, five hundred sixteen".