626401646125 has 16 divisors (see below), whose sum is σ = 781836275376. Its totient is φ = 501065534400.

The previous prime is 626401646083. The next prime is 626401646131. The reversal of 626401646125 is 521646104626.

It can be written as a sum of positive squares in 8 ways, for example, as 36950835076 + 589450811049 = 192226^2 + 767757^2 .

It is not a de Polignac number, because 626401646125 - 2⁷ = 626401645997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 867279 + ... + 1415971.

It is an arithmetic number, because the mean of its divisors is an integer number (48864767211).

Almost surely, 2^626401646125 is an apocalyptic number.

It is an amenable number.

626401646125 is a deficient number, since it is larger than the sum of its proper divisors (155434629251).

626401646125 is an equidigital number, since it uses as much as digits as its factorization.

626401646125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 557841 (or 557831 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 43.

The spelling of 626401646125 in words is "six hundred twenty-six billion, four hundred one million, six hundred forty-six thousand, one hundred twenty-five".