90859782708 has 18 divisors (see below), whose sum is σ = 229673339714. Its totient is φ = 30286594224.

The previous prime is 90859782707. The next prime is 90859782731. The reversal of 90859782708 is 80728795809.

It can be written as a sum of positive squares in only one way, i.e., 54916172964 + 35943609744 = 234342^2 + 189588^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×90859782708² (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 (90859782707) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1261941391 + ... + 1261941462.

Almost surely, 2^90859782708 is an apocalyptic number.

It is an amenable number.

90859782708 is an abundant number, since it is smaller than the sum of its proper divisors (138813557006).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

90859782708 is a wasteful number, since it uses less digits than its factorization.

90859782708 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2523882863 (or 2523882858 counting only the distinct ones).

The product of its (nonzero) digits is 20321280, while the sum is 63.

The spelling of 90859782708 in words is "ninety billion, eight hundred fifty-nine million, seven hundred eighty-two thousand, seven hundred eight".