80726644 has 12 divisors (see below), whose sum is σ = 142089444. Its totient is φ = 40129664.

The previous prime is 80726641. The next prime is 80726647. The reversal of 80726644 is 44662708.

It is an interprime number because it is at equal distance from previous prime (80726641) and next prime (80726647).

It can be written as a sum of positive squares in 2 ways, for example, as 29030544 + 51696100 = 5388^2 + 7190^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80726641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57637 + ... + 59020.

It is an arithmetic number, because the mean of its divisors is an integer number (11840787).

Almost surely, 2^80726644 is an apocalyptic number.

It is an amenable number.

80726644 is a deficient number, since it is larger than the sum of its proper divisors (61362800).

80726644 is a wasteful number, since it uses less digits than its factorization.

80726644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116834 (or 116832 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 37.

The square root of 80726644 is about 8984.8007212180. The cubic root of 80726644 is about 432.1875971359.

The spelling of 80726644 in words is "eighty million, seven hundred twenty-six thousand, six hundred forty-four".