79261381808 has 160 divisors (see below), whose sum is σ = 192452825088. Its totient is φ = 30838579200.

The previous prime is 79261381789. The next prime is 79261381853. The reversal of 79261381808 is 80818316297.

It is a super-2 number, since 2×79261381808² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 79261381808.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19534916 + ... + 19538972.

Almost surely, 2^79261381808 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 79261381808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (96226412544).

79261381808 is an abundant number, since it is smaller than the sum of its proper divisors (113191443280).

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

79261381808 is a wasteful number, since it uses less digits than its factorization.

79261381808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4451 (or 4445 counting only the distinct ones).

The product of its (nonzero) digits is 1161216, while the sum is 53.

The spelling of 79261381808 in words is "seventy-nine billion, two hundred sixty-one million, three hundred eighty-one thousand, eight hundred eight".