5121997564 has 6 divisors (see below), whose sum is σ = 8963495744. Its totient is φ = 2560998780.

The previous prime is 5121997513. The next prime is 5121997591. The reversal of 5121997564 is 4657991215.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 640249692 + ... + 640249699.

Almost surely, 2^5121997564 is an apocalyptic number.

It is an amenable number.

5121997564 is a deficient number, since it is larger than the sum of its proper divisors (3841498180).

5121997564 is a wasteful number, since it uses less digits than its factorization.

5121997564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1280499395 (or 1280499393 counting only the distinct ones).

The product of its digits is 680400, while the sum is 49.

The square root of 5121997564 is about 71568.1323215857. The cubic root of 5121997564 is about 1723.7718698179.

The spelling of 5121997564 in words is "five billion, one hundred twenty-one million, nine hundred ninety-seven thousand, five hundred sixty-four".