90507399591 has 32 divisors (see below), whose sum is σ = 144285861888. Its totient is φ = 49383509760.

The previous prime is 90507399589. The next prime is 90507399623. The reversal of 90507399591 is 19599370509.

It is not a de Polignac number, because 90507399591 - 2¹ = 90507399589 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90507399511) 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 31 ways as a sum of consecutive naturals, for example, 1077820 + ... + 1158753.

It is an arithmetic number, because the mean of its divisors is an integer number (4508933184).

Almost surely, 2^90507399591 is an apocalyptic number.

90507399591 is a deficient number, since it is larger than the sum of its proper divisors (53778462297).

90507399591 is a wasteful number, since it uses less digits than its factorization.

90507399591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2236671.

The product of its (nonzero) digits is 3444525, while the sum is 57.

The spelling of 90507399591 in words is "ninety billion, five hundred seven million, three hundred ninety-nine thousand, five hundred ninety-one".