90923665361 has 8 divisors (see below), whose sum is σ = 91323642984. Its totient is φ = 90524298240.

The previous prime is 90923665321. The next prime is 90923665397. The reversal of 90923665361 is 16356632909.

It can be written as a sum of positive squares in 4 ways, for example, as 52764387025 + 38159278336 = 229705^2 + 195344^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90923665361 is a prime.

It is a super-2 number, since 2×90923665361² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90923665321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 147185 + ... + 451121.

It is an arithmetic number, because the mean of its divisors is an integer number (11415455373).

Almost surely, 2^90923665361 is an apocalyptic number.

It is an amenable number.

90923665361 is a deficient number, since it is larger than the sum of its proper divisors (399977623).

90923665361 is a wasteful number, since it uses less digits than its factorization.

90923665361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 305251.

The product of its (nonzero) digits is 1574640, while the sum is 50.

The spelling of 90923665361 in words is "ninety billion, nine hundred twenty-three million, six hundred sixty-five thousand, three hundred sixty-one".