621232161262291 has 2 divisors, whose sum is σ = 621232161262292. Its totient is φ = 621232161262290.

The previous prime is 621232161262289. The next prime is 621232161262313. The reversal of 621232161262291 is 192262161232126.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 621232161262291 - 2¹ = 621232161262289 is a prime.

Together with 621232161262289, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (621232161262211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310616080631145 + 310616080631146.

It is an arithmetic number, because the mean of its divisors is an integer number (310616080631146).

Almost surely, 2^{621232161262291} is an apocalyptic number.

621232161262291 is a deficient number, since it is larger than the sum of its proper divisors (1).

621232161262291 is an equidigital number, since it uses as much as digits as its factorization.

621232161262291 is an evil number, because the sum of its binary digits is even.

The product of its digits is 373248, while the sum is 46.

The spelling of 621232161262291 in words is "six hundred twenty-one trillion, two hundred thirty-two billion, one hundred sixty-one million, two hundred sixty-two thousand, two hundred ninety-one".