90591728159 has 2 divisors, whose sum is σ = 90591728160. Its totient is φ = 90591728158.

The previous prime is 90591728131. The next prime is 90591728177. The reversal of 90591728159 is 95182719509.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 90591728159 - 2⁸ = 90591727903 is a prime.

It is a super-2 number, since 2×90591728159² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90591728459) 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 as a sum of consecutive naturals, namely, 45295864079 + 45295864080.

It is an arithmetic number, because the mean of its divisors is an integer number (45295864080).

Almost surely, 2^90591728159 is an apocalyptic number.

90591728159 is a deficient number, since it is larger than the sum of its proper divisors (1).

90591728159 is an equidigital number, since it uses as much as digits as its factorization.

90591728159 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2041200, while the sum is 56.

The spelling of 90591728159 in words is "ninety billion, five hundred ninety-one million, seven hundred twenty-eight thousand, one hundred fifty-nine".