74861635945 has 4 divisors (see below), whose sum is σ = 89833963140. Its totient is φ = 59889308752.

The previous prime is 74861635921. The next prime is 74861635987. The reversal of 74861635945 is 54953616847.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54953616847 = 23 ⋅2389287689.

It can be written as a sum of positive squares in 2 ways, for example, as 20281462569 + 54580173376 = 142413^2 + 233624^2 .

It is a cyclic number.

It is not a de Polignac number, because 74861635945 - 2¹¹ = 74861633897 is a prime.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 74861635945.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 7486163590 + ... + 7486163599.

It is an arithmetic number, because the mean of its divisors is an integer number (22458490785).

Almost surely, 2^74861635945 is an apocalyptic number.

It is an amenable number.

74861635945 is a deficient number, since it is larger than the sum of its proper divisors (14972327195).

74861635945 is a wasteful number, since it uses less digits than its factorization.

74861635945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14972327194.

The product of its digits is 21772800, while the sum is 58.

The spelling of 74861635945 in words is "seventy-four billion, eight hundred sixty-one million, six hundred thirty-five thousand, nine hundred forty-five".