423855517667 has 4 divisors (see below), whose sum is σ = 427192962816. Its totient is φ = 420518072520.

The previous prime is 423855517663. The next prime is 423855517681. The reversal of 423855517667 is 766715558324.

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 423855517667 - 2² = 423855517663 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (423855517663) 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, 1668722384 + ... + 1668722637.

It is an arithmetic number, because the mean of its divisors is an integer number (106798240704).

Almost surely, 2^423855517667 is an apocalyptic number.

423855517667 is a deficient number, since it is larger than the sum of its proper divisors (3337445149).

423855517667 is a wasteful number, since it uses less digits than its factorization.

423855517667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3337445148.

The product of its digits is 42336000, while the sum is 59.

The spelling of 423855517667 in words is "four hundred twenty-three billion, eight hundred fifty-five million, five hundred seventeen thousand, six hundred sixty-seven".