625402850621 has 2 divisors, whose sum is σ = 625402850622. Its totient is φ = 625402850620.

The previous prime is 625402850603. The next prime is 625402850623. The reversal of 625402850621 is 126058204526.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 408257102500 + 217145748121 = 638950^2 + 465989^2 .

It is a cyclic number.

It is not a de Polignac number, because 625402850621 - 2²⁶ = 625335741757 is a prime.

It is a super-2 number, since 2×625402850621² (a number of 24 digits) contains 22 as substring.

Together with 625402850623, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (625402850623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 312701425310 + 312701425311.

It is an arithmetic number, because the mean of its divisors is an integer number (312701425311).

Almost surely, 2^625402850621 is an apocalyptic number.

It is an amenable number.

625402850621 is a deficient number, since it is larger than the sum of its proper divisors (1).

625402850621 is an equidigital number, since it uses as much as digits as its factorization.

625402850621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 230400, while the sum is 41.

The spelling of 625402850621 in words is "six hundred twenty-five billion, four hundred two million, eight hundred fifty thousand, six hundred twenty-one".