5391971934956 has 12 divisors (see below), whose sum is σ = 9449888779968. Its totient is φ = 2692003712112.

The previous prime is 5391971934941. The next prime is 5391971934997. The reversal of 5391971934956 is 6594391791935.

It is a super-2 number, since 2×5391971934956² (a number of 26 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 5391971934956.

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, 995560796 + ... + 995566211.

It is an arithmetic number, because the mean of its divisors is an integer number (787490731664).

Almost surely, 2^{5391971934956} is an apocalyptic number.

It is an amenable number.

5391971934956 is a deficient number, since it is larger than the sum of its proper divisors (4057916845012).

5391971934956 is a wasteful number, since it uses less digits than its factorization.

5391971934956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1991127688 (or 1991127686 counting only the distinct ones).

The product of its digits is 248005800, while the sum is 71.

The spelling of 5391971934956 in words is "five trillion, three hundred ninety-one billion, nine hundred seventy-one million, nine hundred thirty-four thousand, nine hundred fifty-six".