90780008709 has 32 divisors (see below), whose sum is σ = 135636125184. Its totient is φ = 53644331520.

The previous prime is 90780008707. The next prime is 90780008729.

90780008709 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 90780008709 - 2¹ = 90780008707 is a prime.

It is a super-2 number, since 2×90780008709² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90780008707) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 370072 + ... + 564369.

It is an arithmetic number, because the mean of its divisors is an integer number (4238628912).

Almost surely, 2^90780008709 is an apocalyptic number.

It is an amenable number.

90780008709 is a deficient number, since it is larger than the sum of its proper divisors (44856116475).

90780008709 is a wasteful number, since it uses less digits than its factorization.

90780008709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 934557.

The product of its (nonzero) digits is 254016, while the sum is 48.

The spelling of 90780008709 in words is "ninety billion, seven hundred eighty million, eight thousand, seven hundred nine".