80856648721842 has 32 divisors (see below), whose sum is σ = 195686679261312. Its totient is φ = 21742964361984.

The previous prime is 80856648721817. The next prime is 80856648721847. The reversal of 80856648721842 is 24812784665808.

It is not an unprimeable number, because it can be changed into a prime (80856648721847) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 56622302313 + ... + 56622303740.

It is an arithmetic number, because the mean of its divisors is an integer number (6115208726916).

Almost surely, 2^{80856648721842} is an apocalyptic number.

80856648721842 is an abundant number, since it is smaller than the sum of its proper divisors (114830030539470).

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

80856648721842 is a wasteful number, since it uses less digits than its factorization.

80856648721842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113244606082.

The product of its (nonzero) digits is 330301440, while the sum is 69.

The spelling of 80856648721842 in words is "eighty trillion, eight hundred fifty-six billion, six hundred forty-eight million, seven hundred twenty-one thousand, eight hundred forty-two".