90685530873 has 24 divisors (see below), whose sum is σ = 149871965568. Its totient is φ = 51761849472.

The previous prime is 90685530827. The next prime is 90685530899. The reversal of 90685530873 is 37803558609.

It is a happy number.

90685530873 is a `hidden beast` number, since 9 + 0 + 6 + 8 + 553 + 0 + 87 + 3 = 666.

It is not a de Polignac number, because 90685530873 - 2⁶ = 90685530809 is a prime.

It is a super-2 number, since 2×90685530873² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (90685530373) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 755536 + ... + 867297.

It is an arithmetic number, because the mean of its divisors is an integer number (6244665232).

Almost surely, 2^90685530873 is an apocalyptic number.

It is an amenable number.

90685530873 is a deficient number, since it is larger than the sum of its proper divisors (59186434695).

90685530873 is a wasteful number, since it uses less digits than its factorization.

90685530873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1623733 (or 1623730 counting only the distinct ones).

The product of its (nonzero) digits is 5443200, while the sum is 54.

The spelling of 90685530873 in words is "ninety billion, six hundred eighty-five million, five hundred thirty thousand, eight hundred seventy-three".