90189791909579 has 16 divisors (see below), whose sum is σ = 94252833235968. Its totient is φ = 86216177621952.

The previous prime is 90189791909491. The next prime is 90189791909671. The reversal of 90189791909579 is 97590919798109.

It is a cyclic number.

It is not a de Polignac number, because 90189791909579 - 2³⁶ = 90121072432843 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 90189791909497 and 90189791909506.

It is not an unprimeable number, because it can be changed into a prime (90189791903579) 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, 97532039 + ... + 98452415.

It is an arithmetic number, because the mean of its divisors is an integer number (5890802077248).

Almost surely, 2^{90189791909579} is an apocalyptic number.

90189791909579 is a deficient number, since it is larger than the sum of its proper divisors (4063041326389).

90189791909579 is a wasteful number, since it uses less digits than its factorization.

90189791909579 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 968954.

The product of its (nonzero) digits is 1041624360, while the sum is 83.

The spelling of 90189791909579 in words is "ninety trillion, one hundred eighty-nine billion, seven hundred ninety-one million, nine hundred nine thousand, five hundred seventy-nine".