7881979104 has 72 divisors (see below), whose sum is σ = 23244563160. Its totient is φ = 2627323776.

The previous prime is 7881979103. The next prime is 7881979109. The reversal of 7881979104 is 4019791887.

It is a tau number, because it is divible by the number of its divisors (72).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7881979103) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 499039 + ... + 514590.

It is an arithmetic number, because the mean of its divisors is an integer number (322841155).

Almost surely, 2^7881979104 is an apocalyptic number.

It is an amenable number.

7881979104 is an abundant number, since it is smaller than the sum of its proper divisors (15362584056).

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

7881979104 is a wasteful number, since it uses less digits than its factorization.

7881979104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1013654 (or 1013634 counting only the distinct ones).

The product of its (nonzero) digits is 1016064, while the sum is 54.

The square root of 7881979104 is about 88780.5108343042. The cubic root of 7881979104 is about 1990.1161606562.

The spelling of 7881979104 in words is "seven billion, eight hundred eighty-one million, nine hundred seventy-nine thousand, one hundred four".