90512165823 has 16 divisors (see below), whose sum is σ = 121222573056. Its totient is φ = 60071695040.

The previous prime is 90512165771. The next prime is 90512165831. The reversal of 90512165823 is 32856121509.

It is a cyclic number.

It is not a de Polignac number, because 90512165823 - 2¹⁴ = 90512149439 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90512165123) 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, 6501436 + ... + 6515342.

It is an arithmetic number, because the mean of its divisors is an integer number (7576410816).

Almost surely, 2^90512165823 is an apocalyptic number.

90512165823 is a deficient number, since it is larger than the sum of its proper divisors (30710407233).

90512165823 is a wasteful number, since it uses less digits than its factorization.

90512165823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23454.

The product of its (nonzero) digits is 129600, while the sum is 42.

The spelling of 90512165823 in words is "ninety billion, five hundred twelve million, one hundred sixty-five thousand, eight hundred twenty-three".