90778923258319 has 4 divisors (see below), whose sum is σ = 93232407670744. Its totient is φ = 88325438845896.

The previous prime is 90778923258293. The next prime is 90778923258341. The reversal of 90778923258319 is 91385232987709.

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

It is a cyclic number.

It is not a de Polignac number, because 90778923258319 - 2²⁹ = 90778386387407 is a prime.

It is a super-2 number, since 2×90778923258319² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90778923258719) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1226742206157 + ... + 1226742206230.

It is an arithmetic number, because the mean of its divisors is an integer number (23308101917686).

Almost surely, 2^{90778923258319} is an apocalyptic number.

90778923258319 is a deficient number, since it is larger than the sum of its proper divisors (2453484412425).

90778923258319 is a wasteful number, since it uses less digits than its factorization.

90778923258319 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2453484412424.

The product of its (nonzero) digits is 411505920, while the sum is 73.

The spelling of 90778923258319 in words is "ninety trillion, seven hundred seventy-eight billion, nine hundred twenty-three million, two hundred fifty-eight thousand, three hundred nineteen".