74785585069 has 4 divisors (see below), whose sum is σ = 80538322396. Its totient is φ = 69032847744.

The previous prime is 74785585001. The next prime is 74785585093. The reversal of 74785585069 is 96058558747.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 17179344900 + 57606240169 = 131070^2 + 240013^2 .

It is a cyclic number.

It is not a de Polignac number, because 74785585069 - 2⁷ = 74785584941 is a prime.

It is a super-2 number, since 2×74785585069² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 74785585069.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74785585969) 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, 2876368644 + ... + 2876368669.

It is an arithmetic number, because the mean of its divisors is an integer number (20134580599).

Almost surely, 2^74785585069 is an apocalyptic number.

It is an amenable number.

74785585069 is a deficient number, since it is larger than the sum of its proper divisors (5752737327).

74785585069 is a wasteful number, since it uses less digits than its factorization.

74785585069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5752737326.

The product of its (nonzero) digits is 84672000, while the sum is 64.

The spelling of 74785585069 in words is "seventy-four billion, seven hundred eighty-five million, five hundred eighty-five thousand, sixty-nine".