621408080775 has 12 divisors (see below), whose sum is σ = 1027394693672. Its totient is φ = 331417643040.

The previous prime is 621408080771. The next prime is 621408080779. The reversal of 621408080775 is 577080804126.

It is an interprime number because it is at equal distance from previous prime (621408080771) and next prime (621408080779).

It is not a de Polignac number, because 621408080775 - 2² = 621408080771 is a prime.

It is a super-2 number, since 2×621408080775² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (621408080771) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4142720464 + ... + 4142720613.

Almost surely, 2^621408080775 is an apocalyptic number.

621408080775 is a deficient number, since it is larger than the sum of its proper divisors (405986612897).

621408080775 is a wasteful number, since it uses less digits than its factorization.

621408080775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8285441090 (or 8285441085 counting only the distinct ones).

The product of its (nonzero) digits is 752640, while the sum is 48.

The spelling of 621408080775 in words is "six hundred twenty-one billion, four hundred eight million, eighty thousand, seven hundred seventy-five".