90856659647 has 8 divisors (see below), whose sum is σ = 103601259216. Its totient is φ = 78934292352.

The previous prime is 90856659643. The next prime is 90856659653. The reversal of 90856659647 is 74695665809.

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 90856659647 - 2² = 90856659643 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90856659643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 205557833 + ... + 205558274.

It is an arithmetic number, because the mean of its divisors is an integer number (12950157402).

Almost surely, 2^90856659647 is an apocalyptic number.

90856659647 is a deficient number, since it is larger than the sum of its proper divisors (12744599569).

90856659647 is a wasteful number, since it uses less digits than its factorization.

90856659647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 411116137.

The product of its (nonzero) digits is 97977600, while the sum is 65.

The spelling of 90856659647 in words is "ninety billion, eight hundred fifty-six million, six hundred fifty-nine thousand, six hundred forty-seven".