15667042423 has 4 divisors (see below), whose sum is σ = 16090476040. Its totient is φ = 15243608808.

The previous prime is 15667042381. The next prime is 15667042429. The reversal of 15667042423 is 32424076651.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32424076651 = 89119 ⋅363829.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15667042423 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 (15667042429) 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, 211716753 + ... + 211716826.

It is an arithmetic number, because the mean of its divisors is an integer number (4022619010).

Almost surely, 2^15667042423 is an apocalyptic number.

15667042423 is a deficient number, since it is larger than the sum of its proper divisors (423433617).

15667042423 is an equidigital number, since it uses as much as digits as its factorization.

15667042423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 423433616.

The product of its (nonzero) digits is 241920, while the sum is 40.

The spelling of 15667042423 in words is "fifteen billion, six hundred sixty-seven million, forty-two thousand, four hundred twenty-three".