378438177823 has 4 divisors (see below), whose sum is σ = 379208928168. Its totient is φ = 377667427480.

The previous prime is 378438177797. The next prime is 378438177833. The reversal of 378438177823 is 328771834873.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 328771834873 = 3919 ⋅83891767.

It is a cyclic number.

It is not a de Polignac number, because 378438177823 - 2³³ = 369848243231 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 (378438177833) 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, 385374436 + ... + 385375417.

It is an arithmetic number, because the mean of its divisors is an integer number (94802232042).

Almost surely, 2^378438177823 is an apocalyptic number.

378438177823 is a deficient number, since it is larger than the sum of its proper divisors (770750345).

378438177823 is an equidigital number, since it uses as much as digits as its factorization.

378438177823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 770750344.

The product of its digits is 37933056, while the sum is 61.

The spelling of 378438177823 in words is "three hundred seventy-eight billion, four hundred thirty-eight million, one hundred seventy-seven thousand, eight hundred twenty-three".