80453735721 has 24 divisors (see below), whose sum is σ = 120233393280. Its totient is φ = 51779779296.

The previous prime is 80453735683. The next prime is 80453735749. The reversal of 80453735721 is 12753735408.

80453735721 is a `hidden beast` number, since 8 + 0 + 4 + 5 + 3 + 73 + 572 + 1 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-80453735721 is a prime.

It is a super-2 number, since 2×80453735721² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (80453736721) 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 23 ways as a sum of consecutive naturals, for example, 2879806 + ... + 2907608.

It is an arithmetic number, because the mean of its divisors is an integer number (5009724720).

Almost surely, 2^80453735721 is an apocalyptic number.

It is an amenable number.

80453735721 is a deficient number, since it is larger than the sum of its proper divisors (39779657559).

80453735721 is a wasteful number, since it uses less digits than its factorization.

80453735721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38925 (or 38922 counting only the distinct ones).

The product of its (nonzero) digits is 705600, while the sum is 45.

The spelling of 80453735721 in words is "eighty billion, four hundred fifty-three million, seven hundred thirty-five thousand, seven hundred twenty-one".