621232161245929 has 2 divisors, whose sum is σ = 621232161245930. Its totient is φ = 621232161245928.

The previous prime is 621232161245897. The next prime is 621232161245963. The reversal of 621232161245929 is 929542161232126.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 555924347490304 + 65307813755625 = 23578048^2 + 8081325^2 .

It is a cyclic number.

It is not a de Polignac number, because 621232161245929 - 2⁵ = 621232161245897 is a prime.

It is a super-3 number, since 3×621232161245929³ (a number of 45 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 621232161245929.

It is not a weakly prime, because it can be changed into another prime (621232168245929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310616080622964 + 310616080622965.

It is an arithmetic number, because the mean of its divisors is an integer number (310616080622965).

Almost surely, 2^{621232161245929} is an apocalyptic number.

It is an amenable number.

621232161245929 is a deficient number, since it is larger than the sum of its proper divisors (1).

621232161245929 is an equidigital number, since it uses as much as digits as its factorization.

621232161245929 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5598720, while the sum is 55.

The spelling of 621232161245929 in words is "six hundred twenty-one trillion, two hundred thirty-two billion, one hundred sixty-one million, two hundred forty-five thousand, nine hundred twenty-nine".