74320553999 has 4 divisors (see below), whose sum is σ = 76133250480. Its totient is φ = 72507857520.

The previous prime is 74320553953. The next prime is 74320554029. The reversal of 74320553999 is 99935502347.

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-74320553999 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 (74320553939) 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, 906348179 + ... + 906348260.

It is an arithmetic number, because the mean of its divisors is an integer number (19033312620).

Almost surely, 2^74320553999 is an apocalyptic number.

74320553999 is a deficient number, since it is larger than the sum of its proper divisors (1812696481).

74320553999 is a wasteful number, since it uses less digits than its factorization.

74320553999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1812696480.

The product of its (nonzero) digits is 9185400, while the sum is 56.

The spelling of 74320553999 in words is "seventy-four billion, three hundred twenty million, five hundred fifty-three thousand, nine hundred ninety-nine".