5178121612 has 12 divisors (see below), whose sum is σ = 9071051976. Its totient is φ = 2586392480.

The previous prime is 5178121589. The next prime is 5178121639. The reversal of 5178121612 is 2161218715.

It is a super-2 number, since 2×5178121612² = 53625886857322957088, which contains 22 as substring.

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 in 3 ways as a sum of consecutive naturals, for example, 662713 + ... + 670480.

It is an arithmetic number, because the mean of its divisors is an integer number (755920998).

Almost surely, 2^5178121612 is an apocalyptic number.

It is an amenable number.

5178121612 is a deficient number, since it is larger than the sum of its proper divisors (3892930364).

5178121612 is a wasteful number, since it uses less digits than its factorization.

5178121612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1334168 (or 1334166 counting only the distinct ones).

The product of its digits is 6720, while the sum is 34.

The square root of 5178121612 is about 71959.1662819963. The cubic root of 5178121612 is about 1730.0450623655.

The spelling of 5178121612 in words is "five billion, one hundred seventy-eight million, one hundred twenty-one thousand, six hundred twelve".