625681878 has 16 divisors (see below), whose sum is σ = 1252669440. Its totient is φ = 208343016.

The previous prime is 625681841. The next prime is 625681933. The reversal of 625681878 is 878186526.

625681878 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 625681878.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48118 + ... + 59721.

It is an arithmetic number, because the mean of its divisors is an integer number (78291840).

Almost surely, 2^625681878 is an apocalyptic number.

625681878 is an abundant number, since it is smaller than the sum of its proper divisors (626987562).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

625681878 is a wasteful number, since it uses less digits than its factorization.

625681878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108811.

The product of its digits is 1290240, while the sum is 51.

The square root of 625681878 is about 25013.6338423668. The cubic root of 625681878 is about 855.2987923250.

It can be divided in two parts, 62568 and 1878, that added together give a palindrome (64446).

The spelling of 625681878 in words is "six hundred twenty-five million, six hundred eighty-one thousand, eight hundred seventy-eight".