74564505579 has 16 divisors (see below), whose sum is σ = 106600043520. Its totient is φ = 46193347200.

The previous prime is 74564505577. The next prime is 74564505599. The reversal of 74564505579 is 97550546547.

It is not a de Polignac number, because 74564505579 - 2¹ = 74564505577 is a prime.

It is not an unprimeable number, because it can be changed into a prime (74564505577) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9249447 + ... + 9257504.

It is an arithmetic number, because the mean of its divisors is an integer number (6662502720).

Almost surely, 2^74564505579 is an apocalyptic number.

74564505579 is a gapful number since it is divisible by the number (79) formed by its first and last digit.

74564505579 is a deficient number, since it is larger than the sum of its proper divisors (32035537941).

74564505579 is a wasteful number, since it uses less digits than its factorization.

74564505579 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18507050.

The product of its (nonzero) digits is 26460000, while the sum is 57.

The spelling of 74564505579 in words is "seventy-four billion, five hundred sixty-four million, five hundred five thousand, five hundred seventy-nine".