80821821107 has 16 divisors (see below), whose sum is σ = 87108924672. Its totient is φ = 74708766720.

The previous prime is 80821821103. The next prime is 80821821109. The reversal of 80821821107 is 70112812808.

It is a cyclic number.

It is not a de Polignac number, because 80821821107 - 2² = 80821821103 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (80821821103) 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, 639998 + ... + 755804.

It is an arithmetic number, because the mean of its divisors is an integer number (5444307792).

Almost surely, 2^80821821107 is an apocalyptic number.

80821821107 is a deficient number, since it is larger than the sum of its proper divisors (6287103565).

80821821107 is a wasteful number, since it uses less digits than its factorization.

80821821107 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116558.

The product of its (nonzero) digits is 14336, while the sum is 38.

The spelling of 80821821107 in words is "eighty billion, eight hundred twenty-one million, eight hundred twenty-one thousand, one hundred seven".