80356681 has 8 divisors (see below), whose sum is σ = 87315200. Its totient is φ = 73671120.

The previous prime is 80356669. The next prime is 80356693. The reversal of 80356681 is 18665308.

It is an interprime number because it is at equal distance from previous prime (80356669) and next prime (80356693).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 80356681 - 2⁷ = 80356553 is a prime.

It is a super-2 number, since 2×80356681² = 12914392362671522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 80356681.

It is not an unprimeable number, because it can be changed into a prime (80356621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67626 + ... + 68803.

It is an arithmetic number, because the mean of its divisors is an integer number (10914400).

Almost surely, 2^80356681 is an apocalyptic number.

It is an amenable number.

80356681 is a deficient number, since it is larger than the sum of its proper divisors (6958519).

80356681 is a wasteful number, since it uses less digits than its factorization.

80356681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136479.

The product of its (nonzero) digits is 34560, while the sum is 37.

The square root of 80356681 is about 8964.1888088103. The cubic root of 80356681 is about 431.5263602548.

The spelling of 80356681 in words is "eighty million, three hundred fifty-six thousand, six hundred eighty-one".