625521545 has 32 divisors (see below), whose sum is σ = 873452160. Its totient is φ = 424995840.

The previous prime is 625521497. The next prime is 625521551. The reversal of 625521545 is 545125526.

It is not a de Polignac number, because 625521545 - 2¹⁴ = 625505161 is a prime.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 127559 + ... + 132371.

It is an arithmetic number, because the mean of its divisors is an integer number (27295380).

Almost surely, 2^625521545 is an apocalyptic number.

It is an amenable number.

625521545 is a deficient number, since it is larger than the sum of its proper divisors (247930615).

625521545 is a wasteful number, since it uses less digits than its factorization.

625521545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4985.

The product of its digits is 60000, while the sum is 35.

The square root of 625521545 is about 25010.4287248340. The cubic root of 625521545 is about 855.2257283920.

The spelling of 625521545 in words is "six hundred twenty-five million, five hundred twenty-one thousand, five hundred forty-five".