80720623671 has 4 divisors (see below), whose sum is σ = 107627498232. Its totient is φ = 53813749112.

The previous prime is 80720623651. The next prime is 80720623673. The reversal of 80720623671 is 17632602708.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 80720623671 - 2⁵ = 80720623639 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80720623673) 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, 13453437276 + ... + 13453437281.

It is an arithmetic number, because the mean of its divisors is an integer number (26906874558).

Almost surely, 2^80720623671 is an apocalyptic number.

80720623671 is a deficient number, since it is larger than the sum of its proper divisors (26906874561).

80720623671 is a wasteful number, since it uses less digits than its factorization.

80720623671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26906874560.

The product of its (nonzero) digits is 169344, while the sum is 42.

The spelling of 80720623671 in words is "eighty billion, seven hundred twenty million, six hundred twenty-three thousand, six hundred seventy-one".