423186778947 has 4 divisors (see below), whose sum is σ = 564249038600. Its totient is φ = 282124519296.

The previous prime is 423186778913. The next prime is 423186778991. The reversal of 423186778947 is 749877681324.

423186778947 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 423186778947 - 2¹¹ = 423186776899 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (423186774947) 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, 70531129822 + ... + 70531129827.

It is an arithmetic number, because the mean of its divisors is an integer number (141062259650).

Almost surely, 2^423186778947 is an apocalyptic number.

423186778947 is a deficient number, since it is larger than the sum of its proper divisors (141062259653).

423186778947 is a wasteful number, since it uses less digits than its factorization.

423186778947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141062259652.

The product of its digits is 113799168, while the sum is 66.

The spelling of 423186778947 in words is "four hundred twenty-three billion, one hundred eighty-six million, seven hundred seventy-eight thousand, nine hundred forty-seven".