74865560617 has 4 divisors (see below), whose sum is σ = 74868095956. Its totient is φ = 74863025280.

The previous prime is 74865560557. The next prime is 74865560629. The reversal of 74865560617 is 71606556847.

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 35003042281 + 39862518336 = 187091^2 + 199656^2 .

It is a cyclic number.

It is not a de Polignac number, because 74865560617 - 2⁷ = 74865560489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (74865560677) 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, 1222848 + ... + 1282609.

It is an arithmetic number, because the mean of its divisors is an integer number (18717023989).

Almost surely, 2^74865560617 is an apocalyptic number.

It is an amenable number.

74865560617 is a deficient number, since it is larger than the sum of its proper divisors (2535339).

74865560617 is a wasteful number, since it uses less digits than its factorization.

74865560617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2535338.

The product of its (nonzero) digits is 8467200, while the sum is 55.

The spelling of 74865560617 in words is "seventy-four billion, eight hundred sixty-five million, five hundred sixty thousand, six hundred seventeen".