80735132721 has 16 divisors (see below), whose sum is σ = 108325515584. Its totient is φ = 53485130304.

The previous prime is 80735132711. The next prime is 80735132743. The reversal of 80735132721 is 12723153708.

It is not a de Polignac number, because 80735132721 - 2⁹ = 80735132209 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 80735132721.

It is not an unprimeable number, because it can be changed into a prime (80735132711) 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, 179730 + ... + 440196.

It is an arithmetic number, because the mean of its divisors is an integer number (6770344724).

Almost surely, 2^80735132721 is an apocalyptic number.

It is an amenable number.

80735132721 is a deficient number, since it is larger than the sum of its proper divisors (27590382863).

80735132721 is a wasteful number, since it uses less digits than its factorization.

80735132721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261120.

The product of its (nonzero) digits is 70560, while the sum is 39.

The spelling of 80735132721 in words is "eighty billion, seven hundred thirty-five million, one hundred thirty-two thousand, seven hundred twenty-one".