74192438960639 has 4 divisors (see below), whose sum is σ = 74192666031120. Its totient is φ = 74192211890160.

The previous prime is 74192438960581. The next prime is 74192438960707. The reversal of 74192438960639 is 93606983429147.

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-74192438960639 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 (74192438960239) 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, 113044427 + ... + 113698844.

It is an arithmetic number, because the mean of its divisors is an integer number (18548166507780).

Almost surely, 2^{74192438960639} is an apocalyptic number.

74192438960639 is a deficient number, since it is larger than the sum of its proper divisors (227070481).

74192438960639 is a wasteful number, since it uses less digits than its factorization.

74192438960639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227070480.

The product of its (nonzero) digits is 423263232, while the sum is 71.

The spelling of 74192438960639 in words is "seventy-four trillion, one hundred ninety-two billion, four hundred thirty-eight million, nine hundred sixty thousand, six hundred thirty-nine".