74445372617 has 16 divisors (see below), whose sum is σ = 92845353600. Its totient is φ = 57990416640.

The previous prime is 74445372587. The next prime is 74445372647. The reversal of 74445372617 is 71627354447.

It is an interprime number because it is at equal distance from previous prime (74445372587) and next prime (74445372647).

It is a cyclic number.

It is not a de Polignac number, because 74445372617 - 2⁶ = 74445372553 is a prime.

It is a super-2 number, since 2×74445372617² (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 (74445372647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 81359 + ... + 394347.

It is an arithmetic number, because the mean of its divisors is an integer number (5802834600).

Almost surely, 2^74445372617 is an apocalyptic number.

74445372617 is a gapful number since it is divisible by the number (77) formed by its first and last digit.

It is an amenable number.

74445372617 is a deficient number, since it is larger than the sum of its proper divisors (18399980983).

74445372617 is a wasteful number, since it uses less digits than its factorization.

74445372617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 316096.

The product of its digits is 3951360, while the sum is 50.

The spelling of 74445372617 in words is "seventy-four billion, four hundred forty-five million, three hundred seventy-two thousand, six hundred seventeen".