74931601609 has 4 divisors (see below), whose sum is σ = 77348750080. Its totient is φ = 72514453140.

The previous prime is 74931601603. The next prime is 74931601621. The reversal of 74931601609 is 90610613947.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-74931601609 is a prime.

It is a super-2 number, since 2×74931601609² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (74931601603) 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, 1208574189 + ... + 1208574250.

It is an arithmetic number, because the mean of its divisors is an integer number (19337187520).

Almost surely, 2^74931601609 is an apocalyptic number.

It is an amenable number.

74931601609 is a deficient number, since it is larger than the sum of its proper divisors (2417148471).

74931601609 is a wasteful number, since it uses less digits than its factorization.

74931601609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2417148470.

The product of its (nonzero) digits is 244944, while the sum is 46.

The spelling of 74931601609 in words is "seventy-four billion, nine hundred thirty-one million, six hundred one thousand, six hundred nine".