80621822917 has 16 divisors (see below), whose sum is σ = 81421355520. Its totient is φ = 79827576192.

The previous prime is 80621822899. The next prime is 80621822929. The reversal of 80621822917 is 71922812608.

It is a cyclic number.

It is not a de Polignac number, because 80621822917 - 2¹⁵ = 80621790149 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 (80621822947) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36429903 + ... + 36432115.

It is an arithmetic number, because the mean of its divisors is an integer number (5088834720).

Almost surely, 2^80621822917 is an apocalyptic number.

It is an amenable number.

80621822917 is a deficient number, since it is larger than the sum of its proper divisors (799532603).

80621822917 is a wasteful number, since it uses less digits than its factorization.

80621822917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3252.

The product of its (nonzero) digits is 193536, while the sum is 46.

The spelling of 80621822917 in words is "eighty billion, six hundred twenty-one million, eight hundred twenty-two thousand, nine hundred seventeen".