90847722065 has 8 divisors (see below), whose sum is σ = 109018911528. Its totient is φ = 72677080960.

The previous prime is 90847722061. The next prime is 90847722073. The reversal of 90847722065 is 56022774809.

It can be written as a sum of positive squares in 4 ways, for example, as 987467776 + 89860254289 = 31424^2 + 299767^2 .

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

It is not a de Polignac number, because 90847722065 - 2² = 90847722061 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90847722061) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 479579 + ... + 641631.

It is an arithmetic number, because the mean of its divisors is an integer number (13627363941).

Almost surely, 2^90847722065 is an apocalyptic number.

It is an amenable number.

90847722065 is a deficient number, since it is larger than the sum of its proper divisors (18171189463).

90847722065 is a wasteful number, since it uses less digits than its factorization.

90847722065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 274179.

The product of its (nonzero) digits is 1693440, while the sum is 50.

The spelling of 90847722065 in words is "ninety billion, eight hundred forty-seven million, seven hundred twenty-two thousand, sixty-five".