81079936829 has 8 divisors (see below), whose sum is σ = 81343982592. Its totient is φ = 80816164480.

The previous prime is 81079936807. The next prime is 81079936849. The reversal of 81079936829 is 92863997018.

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 81079936829 - 2²⁴ = 81063159613 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 (81079936849) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 534317 + ... + 669069.

It is an arithmetic number, because the mean of its divisors is an integer number (10167997824).

Almost surely, 2^81079936829 is an apocalyptic number.

It is an amenable number.

81079936829 is a deficient number, since it is larger than the sum of its proper divisors (264045763).

81079936829 is a wasteful number, since it uses less digits than its factorization.

81079936829 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136707.

The product of its (nonzero) digits is 11757312, while the sum is 62.

The spelling of 81079936829 in words is "eighty-one billion, seventy-nine million, nine hundred thirty-six thousand, eight hundred twenty-nine".