74536580891 has 4 divisors (see below), whose sum is σ = 75030200784. Its totient is φ = 74042961000.

The previous prime is 74536580837. The next prime is 74536580927. The reversal of 74536580891 is 19808563547.

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

It is a cyclic number.

It is not a de Polignac number, because 74536580891 - 2¹⁴ = 74536564507 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (74536580491) 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, 246809720 + ... + 246810021.

It is an arithmetic number, because the mean of its divisors is an integer number (18757550196).

Almost surely, 2^74536580891 is an apocalyptic number.

74536580891 is a deficient number, since it is larger than the sum of its proper divisors (493619893).

74536580891 is a wasteful number, since it uses less digits than its factorization.

74536580891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 493619892.

The product of its (nonzero) digits is 7257600, while the sum is 56.

The spelling of 74536580891 in words is "seventy-four billion, five hundred thirty-six million, five hundred eighty thousand, eight hundred ninety-one".