77982267792 has 160 divisors (see below), whose sum is σ = 238631976576. Its totient is φ = 21812989440.

The previous prime is 77982267767. The next prime is 77982267841. The reversal of 77982267792 is 29776228977.

It is a Harshad number since it is a multiple of its sum of digits (66).

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, 783598 + ... + 877490.

Almost surely, 2^77982267792 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 77982267792, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (119315988288).

77982267792 is an abundant number, since it is smaller than the sum of its proper divisors (160649708784).

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

77982267792 is a wasteful number, since it uses less digits than its factorization.

77982267792 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93950 (or 93922 counting only the distinct ones).

The product of its digits is 74680704, while the sum is 66.

The spelling of 77982267792 in words is "seventy-seven billion, nine hundred eighty-two million, two hundred sixty-seven thousand, seven hundred ninety-two".