621262652065 has 16 divisors (see below), whose sum is σ = 848649695616. Its totient is φ = 432182713600.

The previous prime is 621262652027. The next prime is 621262652077. The reversal of 621262652065 is 560256262126.

It is not a de Polignac number, because 621262652065 - 2¹¹ = 621262650017 is a prime.

It is a Duffinian number.

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, 245557096 + ... + 245559625.

It is an arithmetic number, because the mean of its divisors is an integer number (53040605976).

Almost surely, 2^621262652065 is an apocalyptic number.

It is an amenable number.

621262652065 is a deficient number, since it is larger than the sum of its proper divisors (227387043551).

621262652065 is a wasteful number, since it uses less digits than its factorization.

621262652065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 491116760.

The product of its (nonzero) digits is 518400, while the sum is 43.

The spelling of 621262652065 in words is "six hundred twenty-one billion, two hundred sixty-two million, six hundred fifty-two thousand, sixty-five".