90809647563 has 16 divisors (see below), whose sum is σ = 125246589440. Its totient is φ = 58479778656.

The previous prime is 90809647547. The next prime is 90809647631. The reversal of 90809647563 is 36574690809.

It is a happy number.

It is not a de Polignac number, because 90809647563 - 2⁴ = 90809647547 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90809640563) 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 15 ways as a sum of consecutive naturals, for example, 2927395 + ... + 2958252.

It is an arithmetic number, because the mean of its divisors is an integer number (7827911840).

Almost surely, 2^90809647563 is an apocalyptic number.

90809647563 is a deficient number, since it is larger than the sum of its proper divisors (34436941877).

90809647563 is a wasteful number, since it uses less digits than its factorization.

90809647563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5885826.

The product of its (nonzero) digits is 9797760, while the sum is 57.

The spelling of 90809647563 in words is "ninety billion, eight hundred nine million, six hundred forty-seven thousand, five hundred sixty-three".