23278178047 has 4 divisors (see below), whose sum is σ = 24647482656. Its totient is φ = 21908873440.

The previous prime is 23278178009. The next prime is 23278178059. The reversal of 23278178047 is 74087187232.

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 23278178047 - 2³¹ = 21130694399 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23278178347) 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, 684652279 + ... + 684652312.

It is an arithmetic number, because the mean of its divisors is an integer number (6161870664).

Almost surely, 2^23278178047 is an apocalyptic number.

23278178047 is a deficient number, since it is larger than the sum of its proper divisors (1369304609).

23278178047 is a wasteful number, since it uses less digits than its factorization.

23278178047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1369304608.

The product of its (nonzero) digits is 1053696, while the sum is 49.

The spelling of 23278178047 in words is "twenty-three billion, two hundred seventy-eight million, one hundred seventy-eight thousand, forty-seven".