74551189439 has 4 divisors (see below), whose sum is σ = 74574082224. Its totient is φ = 74528296656.

The previous prime is 74551189429. The next prime is 74551189469. The reversal of 74551189439 is 93498115547.

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 74551189439 - 2¹⁶ = 74551123903 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 (74551189429) 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, 11441507 + ... + 11448020.

It is an arithmetic number, because the mean of its divisors is an integer number (18643520556).

Almost surely, 2^74551189439 is an apocalyptic number.

74551189439 is a deficient number, since it is larger than the sum of its proper divisors (22892785).

74551189439 is a wasteful number, since it uses less digits than its factorization.

74551189439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22892784.

The product of its digits is 5443200, while the sum is 56.

The spelling of 74551189439 in words is "seventy-four billion, five hundred fifty-one million, one hundred eighty-nine thousand, four hundred thirty-nine".