621792460789 has 2 divisors, whose sum is σ = 621792460790. Its totient is φ = 621792460788.

The previous prime is 621792460781. The next prime is 621792460873. The reversal of 621792460789 is 987064297126.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 543733688689 + 78058772100 = 737383^2 + 279390^2 .

It is a cyclic number.

It is not a de Polignac number, because 621792460789 - 2³ = 621792460781 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (621792460781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310896230394 + 310896230395.

It is an arithmetic number, because the mean of its divisors is an integer number (310896230395).

Almost surely, 2^621792460789 is an apocalyptic number.

It is an amenable number.

621792460789 is a deficient number, since it is larger than the sum of its proper divisors (1).

621792460789 is an equidigital number, since it uses as much as digits as its factorization.

621792460789 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18289152, while the sum is 61.

The spelling of 621792460789 in words is "six hundred twenty-one billion, seven hundred ninety-two million, four hundred sixty thousand, seven hundred eighty-nine".