5390492931981 has 12 divisors (see below), whose sum is σ = 7786287706080. Its totient is φ = 3593652660360.

The previous prime is 5390492931973. The next prime is 5390492932003. The reversal of 5390492931981 is 1891392940935.

5390492931981 is a `hidden beast` number, since 5 + 39 + 0 + 492 + 9 + 31 + 9 + 81 = 666.

It is not a de Polignac number, because 5390492931981 - 2³ = 5390492931973 is a prime.

It is a super-2 number, since 2×5390492931981² (a number of 26 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (63) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5390492931911) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6291376 + ... + 7096646.

It is an arithmetic number, because the mean of its divisors is an integer number (648857308840).

Almost surely, 2^{5390492931981} is an apocalyptic number.

It is an amenable number.

5390492931981 is a deficient number, since it is larger than the sum of its proper divisors (2395794774099).

5390492931981 is a wasteful number, since it uses less digits than its factorization.

5390492931981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1549056 (or 1549053 counting only the distinct ones).

The product of its (nonzero) digits is 18895680, while the sum is 63.

The spelling of 5390492931981 in words is "five trillion, three hundred ninety billion, four hundred ninety-two million, nine hundred thirty-one thousand, nine hundred eighty-one".