625044756445321 has 2 divisors, whose sum is σ = 625044756445322. Its totient is φ = 625044756445320.

The previous prime is 625044756445261. The next prime is 625044756445349. The reversal of 625044756445321 is 123544657440526.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 597833551903225 + 27211204542096 = 24450635^2 + 5216436^2 .

It is a cyclic number.

It is not a de Polignac number, because 625044756445321 - 2⁹ = 625044756444809 is a prime.

It is a super-3 number, since 3×625044756445321³ (a number of 45 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (625044756425321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 312522378222660 + 312522378222661.

It is an arithmetic number, because the mean of its divisors is an integer number (312522378222661).

Almost surely, 2^{625044756445321} is an apocalyptic number.

It is an amenable number.

625044756445321 is a deficient number, since it is larger than the sum of its proper divisors (1).

625044756445321 is an equidigital number, since it uses as much as digits as its factorization.

625044756445321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96768000, while the sum is 58.

The spelling of 625044756445321 in words is "six hundred twenty-five trillion, forty-four billion, seven hundred fifty-six million, four hundred forty-five thousand, three hundred twenty-one".