90994533668 has 12 divisors (see below), whose sum is σ = 159248760972. Its totient is φ = 45494887680.

The previous prime is 90994533667. The next prime is 90994533671. The reversal of 90994533668 is 86633549909.

It can be written as a sum of positive squares in 2 ways, for example, as 46607628544 + 44386905124 = 215888^2 + 210682^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 90994533668.

It is not an unprimeable number, because it can be changed into a prime (90994533667) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 507305 + ... + 662832.

It is an arithmetic number, because the mean of its divisors is an integer number (13270730081).

Almost surely, 2^90994533668 is an apocalyptic number.

It is an amenable number.

90994533668 is a deficient number, since it is larger than the sum of its proper divisors (68254227304).

90994533668 is a wasteful number, since it uses less digits than its factorization.

90994533668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1189582 (or 1189580 counting only the distinct ones).

The product of its (nonzero) digits is 37791360, while the sum is 62.

The spelling of 90994533668 in words is "ninety billion, nine hundred ninety-four million, five hundred thirty-three thousand, six hundred sixty-eight".