90531463689 has 12 divisors (see below), whose sum is σ = 138459885876. Its totient is φ = 56804055552.

The previous prime is 90531463681. The next prime is 90531463703. The reversal of 90531463689 is 98636413509.

90531463689 is a `hidden beast` number, since 9 + 0 + 531 + 46 + 3 + 68 + 9 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 42649271289 + 47882192400 = 206517^2 + 218820^2 .

It is not a de Polignac number, because 90531463689 - 2³ = 90531463681 is a prime.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (90531463681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 295854304 + ... + 295854609.

It is an arithmetic number, because the mean of its divisors is an integer number (11538323823).

Almost surely, 2^90531463689 is an apocalyptic number.

It is an amenable number.

90531463689 is a deficient number, since it is larger than the sum of its proper divisors (47928422187).

90531463689 is a wasteful number, since it uses less digits than its factorization.

90531463689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 591708936 (or 591708933 counting only the distinct ones).

The product of its (nonzero) digits is 4199040, while the sum is 54.

The spelling of 90531463689 in words is "ninety billion, five hundred thirty-one million, four hundred sixty-three thousand, six hundred eighty-nine".