90784397455 has 4 divisors (see below), whose sum is σ = 108941276952. Its totient is φ = 72627517960.

The previous prime is 90784397437. The next prime is 90784397503. The reversal of 90784397455 is 55479348709.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 90784397455 - 2⁵ = 90784397423 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 90784397393 and 90784397402.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9078439741 + ... + 9078439750.

It is an arithmetic number, because the mean of its divisors is an integer number (27235319238).

Almost surely, 2^90784397455 is an apocalyptic number.

90784397455 is a deficient number, since it is larger than the sum of its proper divisors (18156879497).

90784397455 is a wasteful number, since it uses less digits than its factorization.

90784397455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18156879496.

The product of its (nonzero) digits is 38102400, while the sum is 61.

The spelling of 90784397455 in words is "ninety billion, seven hundred eighty-four million, three hundred ninety-seven thousand, four hundred fifty-five".