80129282661 has 12 divisors (see below), whose sum is σ = 115755427788. Its totient is φ = 53413461504.

The previous prime is 80129282659. The next prime is 80129282669. The reversal of 80129282661 is 16628292108.

It can be written as a sum of positive squares in 2 ways, for example, as 3006438561 + 77122844100 = 54831^2 + 277710^2 .

It is not a de Polignac number, because 80129282661 - 2¹ = 80129282659 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80129282669) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 420540 + ... + 580613.

It is an arithmetic number, because the mean of its divisors is an integer number (9646285649).

Almost surely, 2^80129282661 is an apocalyptic number.

It is an amenable number.

80129282661 is a deficient number, since it is larger than the sum of its proper divisors (35626145127).

80129282661 is a wasteful number, since it uses less digits than its factorization.

80129282661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1010052 (or 1010049 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 45.

The spelling of 80129282661 in words is "eighty billion, one hundred twenty-nine million, two hundred eighty-two thousand, six hundred sixty-one".