90991526739 has 8 divisors (see below), whose sum is σ = 121323541440. Its totient is φ = 60660264936.

The previous prime is 90991526723. The next prime is 90991526749. The reversal of 90991526739 is 93762519909.

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

It is not a de Polignac number, because 90991526739 - 2⁴ = 90991526723 is a prime.

It is a Smith number, since the sum of its digits (60) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (90991526719) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 220672 + ... + 480290.

It is an arithmetic number, because the mean of its divisors is an integer number (15165442680).

Almost surely, 2^90991526739 is an apocalyptic number.

90991526739 is a deficient number, since it is larger than the sum of its proper divisors (30332014701).

90991526739 is a wasteful number, since it uses less digits than its factorization.

90991526739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 376449.

The product of its (nonzero) digits is 8266860, while the sum is 60.

The spelling of 90991526739 in words is "ninety billion, nine hundred ninety-one million, five hundred twenty-six thousand, seven hundred thirty-nine".