625318774441 has 9 divisors (see below), whose sum is σ = 629960568471. Its totient is φ = 620710951824.

The previous prime is 625318774427. The next prime is 625318774447. The reversal of 625318774441 is 144477813526.

The square root of 625318774441 is 790771.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 597496534441 + 27822240000 = 772979^2 + 166800^2 .

It is not a de Polignac number, because 625318774441 - 2³³ = 616728839849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (625318774447) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 109914325 + ... + 109920013.

It is an arithmetic number, because the mean of its divisors is an integer number (69995618719).

Almost surely, 2^625318774441 is an apocalyptic number.

625318774441 is the 790771-st square number.

625318774441 is the 395386-th centered octagonal number.

It is an amenable number.

625318774441 is a deficient number, since it is larger than the sum of its proper divisors (4641794030).

625318774441 is an frugal number, since it uses more digits than its factorization.

625318774441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11656 (or 5828 counting only the distinct ones).

The product of its digits is 4515840, while the sum is 52.

The spelling of 625318774441 in words is "six hundred twenty-five billion, three hundred eighteen million, seven hundred seventy-four thousand, four hundred forty-one".