621046874665 has 16 divisors (see below), whose sum is σ = 852736631040. Its totient is φ = 425353112640.

The previous prime is 621046874611. The next prime is 621046874699. The reversal of 621046874665 is 566478640126.

It is a happy number.

It is not a de Polignac number, because 621046874665 - 2⁷ = 621046874537 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10545246 + ... + 10603975.

It is an arithmetic number, because the mean of its divisors is an integer number (53296039440).

Almost surely, 2^621046874665 is an apocalyptic number.

It is an amenable number.

621046874665 is a deficient number, since it is larger than the sum of its proper divisors (231689756375).

621046874665 is a wasteful number, since it uses less digits than its factorization.

621046874665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21150072.

The product of its (nonzero) digits is 11612160, while the sum is 55.

The spelling of 621046874665 in words is "six hundred twenty-one billion, forty-six million, eight hundred seventy-four thousand, six hundred sixty-five".