90564395439 has 8 divisors (see below), whose sum is σ = 138002888320. Its totient is φ = 51751083096.

The previous prime is 90564395419. The next prime is 90564395497. The reversal of 90564395439 is 93459346509.

It is a happy number.

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

It is not a de Polignac number, because 90564395439 - 2¹¹ = 90564393391 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 (90564395419) 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, 2156295109 + ... + 2156295150.

It is an arithmetic number, because the mean of its divisors is an integer number (17250361040).

Almost surely, 2^90564395439 is an apocalyptic number.

90564395439 is a deficient number, since it is larger than the sum of its proper divisors (47438492881).

90564395439 is a wasteful number, since it uses less digits than its factorization.

90564395439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4312590269.

The product of its (nonzero) digits is 15746400, while the sum is 57.

The spelling of 90564395439 in words is "ninety billion, five hundred sixty-four million, three hundred ninety-five thousand, four hundred thirty-nine".