79771847736 has 128 divisors (see below), whose sum is σ = 229036032000. Its totient is φ = 22680611712.

The previous prime is 79771847711. The next prime is 79771847747. The reversal of 79771847736 is 63774817797.

It is a congruent number.

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, 36608295 + ... + 36610473.

It is an arithmetic number, because the mean of its divisors is an integer number (1789344000).

Almost surely, 2^79771847736 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 79771847736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (114518016000).

79771847736 is an abundant number, since it is smaller than the sum of its proper divisors (149264184264).

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

79771847736 is a wasteful number, since it uses less digits than its factorization.

79771847736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3161 (or 3157 counting only the distinct ones).

The product of its digits is 87127488, while the sum is 66.

The spelling of 79771847736 in words is "seventy-nine billion, seven hundred seventy-one million, eight hundred forty-seven thousand, seven hundred thirty-six".