80437661911 has 4 divisors (see below), whose sum is σ = 80445502192. Its totient is φ = 80429821632.

The previous prime is 80437661893. The next prime is 80437661917. The reversal of 80437661911 is 11916673408.

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 80437661911 - 2⁵ = 80437661879 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80437661917) 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, 3904731 + ... + 3925276.

It is an arithmetic number, because the mean of its divisors is an integer number (20111375548).

Almost surely, 2^80437661911 is an apocalyptic number.

80437661911 is a deficient number, since it is larger than the sum of its proper divisors (7840281).

80437661911 is a wasteful number, since it uses less digits than its factorization.

80437661911 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7840280.

The product of its (nonzero) digits is 217728, while the sum is 46.

The spelling of 80437661911 in words is "eighty billion, four hundred thirty-seven million, six hundred sixty-one thousand, nine hundred eleven".