74813451632639 has 4 divisors (see below), whose sum is σ = 74834833017000. Its totient is φ = 74792070248280.

The previous prime is 74813451632627. The next prime is 74813451632659. The reversal of 74813451632639 is 93623615431847.

It is a happy number.

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 74813451632639 - 2²⁰ = 74813450584063 is a prime.

It is a super-2 number, since 2×74813451632639² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74813451632659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10690686932 + ... + 10690693929.

It is an arithmetic number, because the mean of its divisors is an integer number (18708708254250).

Almost surely, 2^{74813451632639} is an apocalyptic number.

74813451632639 is a deficient number, since it is larger than the sum of its proper divisors (21381384361).

74813451632639 is a wasteful number, since it uses less digits than its factorization.

74813451632639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21381384360.

The product of its digits is 78382080, while the sum is 62.

The spelling of 74813451632639 in words is "seventy-four trillion, eight hundred thirteen billion, four hundred fifty-one million, six hundred thirty-two thousand, six hundred thirty-nine".