625023104636621 has 2 divisors, whose sum is σ = 625023104636622. Its totient is φ = 625023104636620.

The previous prime is 625023104636527. The next prime is 625023104636641. The reversal of 625023104636621 is 126636401320526.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 524260656834121 + 100762447802500 = 22896739^2 + 10038050^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-625023104636621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (625023104636641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 312511552318310 + 312511552318311.

It is an arithmetic number, because the mean of its divisors is an integer number (312511552318311).

Almost surely, 2^{625023104636621} is an apocalyptic number.

It is an amenable number.

625023104636621 is a deficient number, since it is larger than the sum of its proper divisors (1).

625023104636621 is an equidigital number, since it uses as much as digits as its factorization.

625023104636621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1866240, while the sum is 47.

The spelling of 625023104636621 in words is "six hundred twenty-five trillion, twenty-three billion, one hundred four million, six hundred thirty-six thousand, six hundred twenty-one".