90768317499 has 16 divisors (see below), whose sum is σ = 134552801440. Its totient is φ = 60475662720.

The previous prime is 90768317491. The next prime is 90768317509. The reversal of 90768317499 is 99471386709.

It is not a de Polignac number, because 90768317499 - 2³ = 90768317491 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90768317491) 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, 969682 + ... + 1059159.

It is an arithmetic number, because the mean of its divisors is an integer number (8409550090).

Almost surely, 2^90768317499 is an apocalyptic number.

90768317499 is a deficient number, since it is larger than the sum of its proper divisors (43784483941).

90768317499 is a wasteful number, since it uses less digits than its factorization.

90768317499 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2030507 (or 2030501 counting only the distinct ones).

The product of its (nonzero) digits is 20575296, while the sum is 63.

The spelling of 90768317499 in words is "ninety billion, seven hundred sixty-eight million, three hundred seventeen thousand, four hundred ninety-nine".