8165456780 has 48 divisors (see below), whose sum is σ = 19269399744. Its totient is φ = 2883851520.

The previous prime is 8165456759. The next prime is 8165456791. The reversal of 8165456780 is 876545618.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 676751 + ... + 688710.

It is an arithmetic number, because the mean of its divisors is an integer number (401445828).

Almost surely, 2^8165456780 is an apocalyptic number.

It is an amenable number.

8165456780 is an abundant number, since it is smaller than the sum of its proper divisors (11103942964).

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

8165456780 is a wasteful number, since it uses less digits than its factorization.

8165456780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1365506 (or 1365504 counting only the distinct ones).

The product of its (nonzero) digits is 1612800, while the sum is 50.

The square root of 8165456780 is about 90362.9170622551. The cubic root of 8165456780 is about 2013.6940869887.

The spelling of 8165456780 in words is "eight billion, one hundred sixty-five million, four hundred fifty-six thousand, seven hundred eighty".