74543745618 has 12 divisors (see below), whose sum is σ = 161511448878. Its totient is φ = 24847915200.

The previous prime is 74543745583. The next prime is 74543745671. The reversal of 74543745618 is 81654734547.

74543745618 is a `hidden beast` number, since 7 + 4 + 5 + 4 + 3 + 74 + 561 + 8 = 666.

It can be written as a sum of positive squares in only one way, i.e., 68967688689 + 5576056929 = 262617^2 + 74673^2 .

It is a super-2 number, since 2×74543745618² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 2070659583 + ... + 2070659618.

Almost surely, 2^74543745618 is an apocalyptic number.

74543745618 is an abundant number, since it is smaller than the sum of its proper divisors (86967703260).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

74543745618 is a wasteful number, since it uses less digits than its factorization.

74543745618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4141319209 (or 4141319206 counting only the distinct ones).

The product of its digits is 11289600, while the sum is 54.

The spelling of 74543745618 in words is "seventy-four billion, five hundred forty-three million, seven hundred forty-five thousand, six hundred eighteen".