74294385779 has 4 divisors (see below), whose sum is σ = 78664643784. Its totient is φ = 69924127776.

The previous prime is 74294385757. The next prime is 74294385797. The reversal of 74294385779 is 97758349247.

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-74294385779 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (74294385719) 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, 2185128977 + ... + 2185129010.

It is an arithmetic number, because the mean of its divisors is an integer number (19666160946).

Almost surely, 2^74294385779 is an apocalyptic number.

74294385779 is a deficient number, since it is larger than the sum of its proper divisors (4370258005).

74294385779 is a wasteful number, since it uses less digits than its factorization.

74294385779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4370258004.

The product of its digits is 106686720, while the sum is 65.

The spelling of 74294385779 in words is "seventy-four billion, two hundred ninety-four million, three hundred eighty-five thousand, seven hundred seventy-nine".