42663191999 has 4 divisors (see below), whose sum is σ = 42664355664. Its totient is φ = 42662028336.

The previous prime is 42663191957. The next prime is 42663192007. The reversal of 42663191999 is 99919136624.

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-42663191999 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 (42663191939) 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, 524987 + ... + 600780.

It is an arithmetic number, because the mean of its divisors is an integer number (10666088916).

Almost surely, 2^42663191999 is an apocalyptic number.

42663191999 is a deficient number, since it is larger than the sum of its proper divisors (1163665).

42663191999 is a wasteful number, since it uses less digits than its factorization.

42663191999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1163664.

The product of its digits is 5668704, while the sum is 59.

The spelling of 42663191999 in words is "forty-two billion, six hundred sixty-three million, one hundred ninety-one thousand, nine hundred ninety-nine".