80972281653 has 4 divisors (see below), whose sum is σ = 107963042208. Its totient is φ = 53981521100.

The previous prime is 80972281619. The next prime is 80972281661. The reversal of 80972281653 is 35618227908.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 80972281653 - 2³³ = 72382347061 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 80972281596 and 80972281605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80972281673) 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, 13495380273 + ... + 13495380278.

It is an arithmetic number, because the mean of its divisors is an integer number (26990760552).

Almost surely, 2^80972281653 is an apocalyptic number.

It is an amenable number.

80972281653 is a deficient number, since it is larger than the sum of its proper divisors (26990760555).

80972281653 is a wasteful number, since it uses less digits than its factorization.

80972281653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26990760554.

The product of its (nonzero) digits is 1451520, while the sum is 51.

The spelling of 80972281653 in words is "eighty billion, nine hundred seventy-two million, two hundred eighty-one thousand, six hundred fifty-three".