90436839668817 has 8 divisors (see below), whose sum is σ = 120598337845440. Its totient is φ = 60283283969040.

The previous prime is 90436839668803. The next prime is 90436839668951. The reversal of 90436839668817 is 71886693863409.

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

It is not a de Polignac number, because 90436839668817 - 2⁶ = 90436839668753 is a prime.

It is a super-3 number, since 3×90436839668817³ (a number of 43 digits) contains 333 as substring.

It is a partition number, being equal to the number of ways a set of 238 identical objects can be partitioned into subset.

It is not an unprimeable number, because it can be changed into a prime (90436839668317) 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, 1985592642 + ... + 1985638187.

It is an arithmetic number, because the mean of its divisors is an integer number (15074792230680).

Almost surely, 2^{90436839668817} is an apocalyptic number.

It is an amenable number.

90436839668817 is a deficient number, since it is larger than the sum of its proper divisors (30161498176623).

90436839668817 is a wasteful number, since it uses less digits than its factorization.

90436839668817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3971238423.

The product of its (nonzero) digits is 2257403904, while the sum is 78.

The spelling of 90436839668817 in words is "ninety trillion, four hundred thirty-six billion, eight hundred thirty-nine million, six hundred sixty-eight thousand, eight hundred seventeen".