90856936729 has 8 divisors (see below), whose sum is σ = 97850491200. Its totient is φ = 83864033616.

The previous prime is 90856936717. The next prime is 90856936739. The reversal of 90856936729 is 92763965809.

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 90856936729 - 2⁷ = 90856936601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90856936739) 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, 149004 + ... + 451570.

It is an arithmetic number, because the mean of its divisors is an integer number (12231311400).

Almost surely, 2^90856936729 is an apocalyptic number.

It is an amenable number.

90856936729 is a deficient number, since it is larger than the sum of its proper divisors (6993554471).

90856936729 is a wasteful number, since it uses less digits than its factorization.

90856936729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 325679.

The product of its (nonzero) digits is 44089920, while the sum is 64.

The spelling of 90856936729 in words is "ninety billion, eight hundred fifty-six million, nine hundred thirty-six thousand, seven hundred twenty-nine".