80126045972 has 18 divisors (see below), whose sum is σ = 163113736842. Its totient is φ = 34339733904.

The previous prime is 80126045971. The next prime is 80126045977. The reversal of 80126045972 is 27954062108.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 49432407556 + 30693638416 = 222334^2 + 175196^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80126045971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 204402983 + ... + 204403374.

It is an arithmetic number, because the mean of its divisors is an integer number (9061874269).

Almost surely, 2^80126045972 is an apocalyptic number.

It is an amenable number.

80126045972 is an abundant number, since it is smaller than the sum of its proper divisors (82987690870).

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

80126045972 is a wasteful number, since it uses less digits than its factorization.

80126045972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 408806375 (or 408806366 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 44.

The spelling of 80126045972 in words is "eighty billion, one hundred twenty-six million, forty-five thousand, nine hundred seventy-two".