80405962724021 has 4 divisors (see below), whose sum is σ = 87715595698944. Its totient is φ = 73096329749100.

The previous prime is 80405962723997. The next prime is 80405962724029. The reversal of 80405962724021 is 12042726950408.

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 a de Polignac number, because none of the positive numbers 2^k-80405962724021 is a prime.

It is a super-2 number, since 2×80405962724021² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80405962724029) 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, 3654816487445 + ... + 3654816487466.

It is an arithmetic number, because the mean of its divisors is an integer number (21928898924736).

Almost surely, 2^{80405962724021} is an apocalyptic number.

It is an amenable number.

80405962724021 is a deficient number, since it is larger than the sum of its proper divisors (7309632974923).

80405962724021 is a wasteful number, since it uses less digits than its factorization.

80405962724021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7309632974922.

The product of its (nonzero) digits is 1935360, while the sum is 50.

The spelling of 80405962724021 in words is "eighty trillion, four hundred five billion, nine hundred sixty-two million, seven hundred twenty-four thousand, twenty-one".