80869335021 has 6 divisors (see below), whose sum is σ = 116811261710. Its totient is φ = 53912890008.

The previous prime is 80869334999. The next prime is 80869335023. The reversal of 80869335021 is 12053396808.

It is a happy number.

80869335021 is a `hidden beast` number, since 80 + 8 + 69 + 3 + 3 + 502 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 79081313796 + 1788021225 = 281214^2 + 42285^2 .

It is not a de Polignac number, because 80869335021 - 2¹³ = 80869326829 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 (80869335023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4492740826 + ... + 4492740843.

Almost surely, 2^80869335021 is an apocalyptic number.

It is an amenable number.

80869335021 is a deficient number, since it is larger than the sum of its proper divisors (35941926689).

80869335021 is a wasteful number, since it uses less digits than its factorization.

80869335021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8985481675 (or 8985481672 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 45.

The spelling of 80869335021 in words is "eighty billion, eight hundred sixty-nine million, three hundred thirty-five thousand, twenty-one".