625869861 has 16 divisors (see below), whose sum is σ = 879475200. Its totient is φ = 394808688.

The previous prime is 625869791. The next prime is 625869863. The reversal of 625869861 is 168968526.

It is not a de Polignac number, because 625869861 - 2¹³ = 625861669 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (625869863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44370 + ... + 56748.

It is an arithmetic number, because the mean of its divisors is an integer number (54967200).

Almost surely, 2^625869861 is an apocalyptic number.

It is an amenable number.

625869861 is a deficient number, since it is larger than the sum of its proper divisors (253605339).

625869861 is a wasteful number, since it uses less digits than its factorization.

625869861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13288.

The product of its digits is 1244160, while the sum is 51.

The square root of 625869861 is about 25017.3911709435. The cubic root of 625869861 is about 855.3844405003.

The spelling of 625869861 in words is "six hundred twenty-five million, eight hundred sixty-nine thousand, eight hundred sixty-one".