80640840468021 has 8 divisors (see below), whose sum is σ = 107567089475040. Its totient is φ = 53737575886512.

The previous prime is 80640840467959. The next prime is 80640840468049. The reversal of 80640840468021 is 12086404804608.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 80640840468021 - 2²³ = 80640832079413 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80640840468121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5746098190 + ... + 5746112223.

It is an arithmetic number, because the mean of its divisors is an integer number (13445886184380).

Almost surely, 2^{80640840468021} is an apocalyptic number.

It is an amenable number.

80640840468021 is a deficient number, since it is larger than the sum of its proper divisors (26926249007019).

80640840468021 is a wasteful number, since it uses less digits than its factorization.

80640840468021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11492212755.

The product of its (nonzero) digits is 2359296, while the sum is 51.

The spelling of 80640840468021 in words is "eighty trillion, six hundred forty billion, eight hundred forty million, four hundred sixty-eight thousand, twenty-one".