23278158812773 has 4 divisors (see below), whose sum is σ = 23434388066700. Its totient is φ = 23121929558848.

The previous prime is 23278158812749. The next prime is 23278158812813. The reversal of 23278158812773 is 37721885187232.

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

It can be written as a sum of positive squares in 2 ways, for example, as 15141071669409 + 8137087143364 = 3891153^2 + 2852558^2 .

It is a cyclic number.

It is not a de Polignac number, because 23278158812773 - 2³³ = 23269568878181 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23278158810773) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 78114626740 + ... + 78114627037.

It is an arithmetic number, because the mean of its divisors is an integer number (5858597016675).

Almost surely, 2^{23278158812773} is an apocalyptic number.

It is an amenable number.

23278158812773 is a deficient number, since it is larger than the sum of its proper divisors (156229253927).

23278158812773 is a wasteful number, since it uses less digits than its factorization.

23278158812773 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156229253926.

The product of its digits is 63221760, while the sum is 64.

The spelling of 23278158812773 in words is "twenty-three trillion, two hundred seventy-eight billion, one hundred fifty-eight million, eight hundred twelve thousand, seven hundred seventy-three".