74511866909 has 18 divisors (see below), whose sum is σ = 77794881870. Its totient is φ = 71282521408.

The previous prime is 74511866903. The next prime is 74511866921. The reversal of 74511866909 is 90966811547.

It can be written as a sum of positive squares in 9 ways, for example, as 27345583225 + 47166283684 = 165365^2 + 217178^2 .

It is not a de Polignac number, because 74511866909 - 2²⁸ = 74243431453 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 (74511866903) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 254306567 + ... + 254306859.

Almost surely, 2^74511866909 is an apocalyptic number.

It is an amenable number.

74511866909 is a deficient number, since it is larger than the sum of its proper divisors (3283014961).

74511866909 is an frugal number, since it uses more digits than its factorization.

74511866909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 961 (or 495 counting only the distinct ones).

The product of its (nonzero) digits is 3265920, while the sum is 56.

The spelling of 74511866909 in words is "seventy-four billion, five hundred eleven million, eight hundred sixty-six thousand, nine hundred nine".