5181391659872 has 12 divisors (see below), whose sum is σ = 10200864830436. Its totient is φ = 2590695829920.

The previous prime is 5181391659859. The next prime is 5181391659881. The reversal of 5181391659872 is 2789561931815.

It is a super-2 number, since 2×5181391659872² (a number of 26 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 5181391659799 and 5181391659808.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80959244654 + ... + 80959244717.

It is an arithmetic number, because the mean of its divisors is an integer number (850072069203).

Almost surely, 2^{5181391659872} is an apocalyptic number.

It is an amenable number.

5181391659872 is a deficient number, since it is larger than the sum of its proper divisors (5019473170564).

5181391659872 is a wasteful number, since it uses less digits than its factorization.

5181391659872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161918489381 (or 161918489373 counting only the distinct ones).

The product of its digits is 32659200, while the sum is 65.

The spelling of 5181391659872 in words is "five trillion, one hundred eighty-one billion, three hundred ninety-one million, six hundred fifty-nine thousand, eight hundred seventy-two".