90718694788 has 12 divisors (see below), whose sum is σ = 158768395660. Its totient is φ = 45356296032.

The previous prime is 90718694777. The next prime is 90718694837. The reversal of 90718694788 is 88749681709.

It can be written as a sum of positive squares in 2 ways, for example, as 31167077764 + 59551617024 = 176542^2 + 244032^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 695283 + ... + 815386.

Almost surely, 2^90718694788 is an apocalyptic number.

It is an amenable number.

90718694788 is a deficient number, since it is larger than the sum of its proper divisors (68049700872).

90718694788 is a wasteful number, since it uses less digits than its factorization.

90718694788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1525686 (or 1525684 counting only the distinct ones).

The product of its (nonzero) digits is 48771072, while the sum is 67.

The spelling of 90718694788 in words is "ninety billion, seven hundred eighteen million, six hundred ninety-four thousand, seven hundred eighty-eight".