90378618792289 has 3 divisors (see below), whose sum is σ = 90378628299057. Its totient is φ = 90378609285522.

The previous prime is 90378618792239. The next prime is 90378618792313. The reversal of 90378618792289 is 98229781687309.

The square root of 90378618792289 is 9506767.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 90378618792289 - 2³⁹ = 89828862978401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90378618792229) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 4753384 + ... + 14260150.

It is an arithmetic number, because the mean of its divisors is an integer number (30126209433019).

Almost surely, 2^{90378618792289} is an apocalyptic number.

90378618792289 is the 9506767-th square number.

90378618792289 is the 4753384-th centered octagonal number.

It is an amenable number.

90378618792289 is a deficient number, since it is larger than the sum of its proper divisors (9506768).

90378618792289 is an frugal number, since it uses more digits than its factorization.

90378618792289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19013534 (or 9506767 counting only the distinct ones).

The product of its (nonzero) digits is 1316818944, while the sum is 79.

The spelling of 90378618792289 in words is "ninety trillion, three hundred seventy-eight billion, six hundred eighteen million, seven hundred ninety-two thousand, two hundred eighty-nine".