623044323761 has 2 divisors, whose sum is σ = 623044323762. Its totient is φ = 623044323760.

The previous prime is 623044323703. The next prime is 623044323763. The reversal of 623044323761 is 167323440326.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 523980538225 + 99063785536 = 723865^2 + 314744^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-623044323761 is a prime.

It is a Sophie Germain prime.

Together with 623044323763, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (623044323763) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 311522161880 + 311522161881.

It is an arithmetic number, because the mean of its divisors is an integer number (311522161881).

Almost surely, 2^623044323761 is an apocalyptic number.

It is an amenable number.

623044323761 is a deficient number, since it is larger than the sum of its proper divisors (1).

623044323761 is an equidigital number, since it uses as much as digits as its factorization.

623044323761 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 435456, while the sum is 41.

The spelling of 623044323761 in words is "six hundred twenty-three billion, forty-four million, three hundred twenty-three thousand, seven hundred sixty-one".