74564340557 has 16 divisors (see below), whose sum is σ = 87403110912. Its totient is φ = 62283926400.

The previous prime is 74564340551. The next prime is 74564340559. The reversal of 74564340557 is 75504346547.

It is a cyclic number.

It is not a de Polignac number, because 74564340557 - 2⁶ = 74564340493 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 (74564340551) 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 15 ways as a sum of consecutive naturals, for example, 409694 + ... + 563007.

It is an arithmetic number, because the mean of its divisors is an integer number (5462694432).

Almost surely, 2^74564340557 is an apocalyptic number.

It is an amenable number.

74564340557 is a deficient number, since it is larger than the sum of its proper divisors (12838770355).

74564340557 is a wasteful number, since it uses less digits than its factorization.

74564340557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 972988.

The product of its (nonzero) digits is 7056000, while the sum is 50.

The spelling of 74564340557 in words is "seventy-four billion, five hundred sixty-four million, three hundred forty thousand, five hundred fifty-seven".