427233915691 has 4 divisors (see below), whose sum is σ = 466073362584. Its totient is φ = 388394468800.

The previous prime is 427233915679. The next prime is 427233915733. The reversal of 427233915691 is 196519332724.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-427233915691 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (427233915611) 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, 19419723430 + ... + 19419723451.

It is an arithmetic number, because the mean of its divisors is an integer number (116518340646).

Almost surely, 2^427233915691 is an apocalyptic number.

427233915691 is a deficient number, since it is larger than the sum of its proper divisors (38839446893).

427233915691 is a wasteful number, since it uses less digits than its factorization.

427233915691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38839446892.

The product of its digits is 2449440, while the sum is 52.

The spelling of 427233915691 in words is "four hundred twenty-seven billion, two hundred thirty-three million, nine hundred fifteen thousand, six hundred ninety-one".