90788288709 has 4 divisors (see below), whose sum is σ = 121051051616. Its totient is φ = 60525525804.

The previous prime is 90788288681. The next prime is 90788288711.

90788288709 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 90788288709 - 2²¹ = 90786191557 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 90788288709.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90788288749) 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, 15131381449 + ... + 15131381454.

It is an arithmetic number, because the mean of its divisors is an integer number (30262762904).

Almost surely, 2^90788288709 is an apocalyptic number.

It is an amenable number.

90788288709 is a deficient number, since it is larger than the sum of its proper divisors (30262762907).

90788288709 is a wasteful number, since it uses less digits than its factorization.

90788288709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30262762906.

The product of its (nonzero) digits is 32514048, while the sum is 66.

The spelling of 90788288709 in words is "ninety billion, seven hundred eighty-eight million, two hundred eighty-eight thousand, seven hundred nine".