621811010747 has 16 divisors (see below), whose sum is σ = 637206731040. Its totient is φ = 606588652800.

The previous prime is 621811010729. The next prime is 621811010759. The reversal of 621811010747 is 747010118126.

It is a cyclic number.

It is not a de Polignac number, because 621811010747 - 2²⁰ = 621809962171 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 621811010747.

It is not an unprimeable number, because it can be changed into a prime (621811010047) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 13986029 + ... + 14030417.

It is an arithmetic number, because the mean of its divisors is an integer number (39825420690).

Almost surely, 2^621811010747 is an apocalyptic number.

621811010747 is a deficient number, since it is larger than the sum of its proper divisors (15395720293).

621811010747 is a wasteful number, since it uses less digits than its factorization.

621811010747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46334.

The product of its (nonzero) digits is 18816, while the sum is 38.

The spelling of 621811010747 in words is "six hundred twenty-one billion, eight hundred eleven million, ten thousand, seven hundred forty-seven".