74135545643 has 4 divisors (see below), whose sum is σ = 74137386720. Its totient is φ = 74133704568.

The previous prime is 74135545621. The next prime is 74135545661. The reversal of 74135545643 is 34654553147.

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 74135545643 - 2²⁶ = 74068436779 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (74135545613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 858755 + ... + 941132.

It is an arithmetic number, because the mean of its divisors is an integer number (18534346680).

Almost surely, 2^74135545643 is an apocalyptic number.

74135545643 is a deficient number, since it is larger than the sum of its proper divisors (1841077).

74135545643 is a wasteful number, since it uses less digits than its factorization.

74135545643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1841076.

The product of its digits is 3024000, while the sum is 47.

The spelling of 74135545643 in words is "seventy-four billion, one hundred thirty-five million, five hundred forty-five thousand, six hundred forty-three".