7855478624 has 48 divisors (see below), whose sum is σ = 17923804416. Its totient is φ = 3319209600.

The previous prime is 7855478623. The next prime is 7855478641. The reversal of 7855478624 is 4268745587.

It is a Harshad number since it is a multiple of its sum of digits (56).

It is a self number, because there is not a number n which added to its sum of digits gives 7855478624.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7855478623) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 231062 + ... + 262869.

It is an arithmetic number, because the mean of its divisors is an integer number (373412592).

Almost surely, 2^7855478624 is an apocalyptic number.

It is an amenable number.

7855478624 is an abundant number, since it is smaller than the sum of its proper divisors (10068325792).

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

7855478624 is a wasteful number, since it uses less digits than its factorization.

7855478624 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 494019 (or 494011 counting only the distinct ones).

The product of its digits is 15052800, while the sum is 56.

The square root of 7855478624 is about 88631.1380046539. The cubic root of 7855478624 is about 1987.8832929476.

The spelling of 7855478624 in words is "seven billion, eight hundred fifty-five million, four hundred seventy-eight thousand, six hundred twenty-four".