6121551515764 has 24 divisors (see below), whose sum is σ = 10817957259200. Its totient is φ = 3030713371584.

The previous prime is 6121551515747. The next prime is 6121551515773. The reversal of 6121551515764 is 4675151551216.

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 in 7 ways as a sum of consecutive naturals, for example, 2782912 + ... + 4470760.

Almost surely, 2^{6121551515764} is an apocalyptic number.

It is an amenable number.

6121551515764 is a deficient number, since it is larger than the sum of its proper divisors (4696405743436).

6121551515764 is a wasteful number, since it uses less digits than its factorization.

6121551515764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1696759 (or 1696757 counting only the distinct ones).

The product of its digits is 1260000, while the sum is 49.

The spelling of 6121551515764 in words is "six trillion, one hundred twenty-one billion, five hundred fifty-one million, five hundred fifteen thousand, seven hundred sixty-four".