625621105 has 8 divisors (see below), whose sum is σ = 751606632. Its totient is φ = 499922688.

The previous prime is 625621099. The next prime is 625621109. The reversal of 625621105 is 501126526.

It can be written as a sum of positive squares in 4 ways, for example, as 160959969 + 464661136 = 12687^2 + 21556^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 625621105 - 2¹³ = 625612913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (625621109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66952 + ... + 75721.

It is an arithmetic number, because the mean of its divisors is an integer number (93950829).

Almost surely, 2^625621105 is an apocalyptic number.

It is an amenable number.

625621105 is a deficient number, since it is larger than the sum of its proper divisors (125985527).

625621105 is a wasteful number, since it uses less digits than its factorization.

625621105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143555.

The product of its (nonzero) digits is 3600, while the sum is 28.

The square root of 625621105 is about 25012.4190153611. The cubic root of 625621105 is about 855.2710994679.

The spelling of 625621105 in words is "six hundred twenty-five million, six hundred twenty-one thousand, one hundred five".