90448432639 has 16 divisors (see below), whose sum is σ = 92839219200. Its totient is φ = 88078237984.

The previous prime is 90448432619. The next prime is 90448432661. The reversal of 90448432639 is 93623484409.

It is a cyclic number.

It is not a de Polignac number, because 90448432639 - 2⁹ = 90448432127 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90448432619) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7654674 + ... + 7666480.

It is an arithmetic number, because the mean of its divisors is an integer number (5802451200).

Almost surely, 2^90448432639 is an apocalyptic number.

90448432639 is a deficient number, since it is larger than the sum of its proper divisors (2390786561).

90448432639 is a wasteful number, since it uses less digits than its factorization.

90448432639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12662.

The product of its (nonzero) digits is 4478976, while the sum is 52.

The spelling of 90448432639 in words is "ninety billion, four hundred forty-eight million, four hundred thirty-two thousand, six hundred thirty-nine".