8101780992 has 120 divisors (see below), whose sum is σ = 23519760264. Its totient is φ = 2684719104.

The previous prime is 8101780979. The next prime is 8101781021. The reversal of 8101780992 is 2990871018.

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, 792103 + ... + 802265.

Almost surely, 2^8101780992 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 8101780992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11759880132).

8101780992 is an abundant number, since it is smaller than the sum of its proper divisors (15417979272).

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

8101780992 is a wasteful number, since it uses less digits than its factorization.

8101780992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10360 (or 10341 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 45.

The square root of 8101780992 is about 90009.8938561756. The cubic root of 8101780992 is about 2008.4460314017.

The spelling of 8101780992 in words is "eight billion, one hundred one million, seven hundred eighty thousand, nine hundred ninety-two".