7981563924 has 36 divisors (see below), whose sum is σ = 20826449280. Its totient is φ = 2574697680.

The previous prime is 7981563901. The next prime is 7981563949. The reversal of 7981563924 is 4293651897.

7981563924 is a `hidden beast` number, since 79 + 8 + 1 + 563 + 9 + 2 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3574854 + ... + 3577085.

It is an arithmetic number, because the mean of its divisors is an integer number (578512480).

Almost surely, 2^7981563924 is an apocalyptic number.

It is an amenable number.

7981563924 is an abundant number, since it is smaller than the sum of its proper divisors (12844885356).

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

7981563924 is a wasteful number, since it uses less digits than its factorization.

7981563924 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7151980 (or 7151975 counting only the distinct ones).

The product of its digits is 3265920, while the sum is 54.

The square root of 7981563924 is about 89339.5988573936. The cubic root of 7981563924 is about 1998.4624786503.

The spelling of 7981563924 in words is "seven billion, nine hundred eighty-one million, five hundred sixty-three thousand, nine hundred twenty-four".