621012774722 has 18 divisors (see below), whose sum is σ = 954863544537. Its totient is φ = 302910771600.

The previous prime is 621012774671. The next prime is 621012774737. The reversal of 621012774722 is 227477210126.

It can be written as a sum of positive squares in 2 ways, for example, as 443501389681 + 177511385041 = 665959^2 + 421321^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=557231.

It is a Harshad number since it is a multiple of its sum of digits (41).

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 621012774722.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 45686147 + ... + 45699737.

Almost surely, 2^621012774722 is an apocalyptic number.

621012774722 is a deficient number, since it is larger than the sum of its proper divisors (333850769815).

621012774722 is an frugal number, since it uses more digits than its factorization.

621012774722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27266 (or 13634 counting only the distinct ones).

The product of its (nonzero) digits is 131712, while the sum is 41.

Adding to 621012774722 its reverse (227477210126), we get a palindrome (848489984848).

The spelling of 621012774722 in words is "six hundred twenty-one billion, twelve million, seven hundred seventy-four thousand, seven hundred twenty-two".