80671443021 has 24 divisors (see below), whose sum is σ = 130136653920. Its totient is φ = 49643962992.

The previous prime is 80671442993. The next prime is 80671443031. The reversal of 80671443021 is 12034417608.

It is not a de Polignac number, because 80671443021 - 2¹⁴ = 80671426637 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80671443031) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12765351 + ... + 12771668.

It is an arithmetic number, because the mean of its divisors is an integer number (5422360580).

Almost surely, 2^80671443021 is an apocalyptic number.

80671443021 is a gapful number since it is divisible by the number (81) formed by its first and last digit.

It is an amenable number.

80671443021 is a deficient number, since it is larger than the sum of its proper divisors (49465210899).

80671443021 is a wasteful number, since it uses less digits than its factorization.

80671443021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25537047 (or 25537035 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The spelling of 80671443021 in words is "eighty billion, six hundred seventy-one million, four hundred forty-three thousand, twenty-one".