74921616169 has 4 divisors (see below), whose sum is σ = 74925062100. Its totient is φ = 74918170240.

The previous prime is 74921616167. The next prime is 74921616197. The reversal of 74921616169 is 96161612947.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 96161612947 = 449 ⋅214168403.

It can be written as a sum of positive squares in 2 ways, for example, as 8660163600 + 66261452569 = 93060^2 + 257413^2 .

It is a cyclic number.

It is not a de Polignac number, because 74921616169 - 2¹ = 74921616167 is a prime.

It is a super-2 number, since 2×74921616169² (a number of 23 digits) contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (74921616167) 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 3 ways as a sum of consecutive naturals, for example, 1690144 + ... + 1733905.

It is an arithmetic number, because the mean of its divisors is an integer number (18731265525).

Almost surely, 2^74921616169 is an apocalyptic number.

It is an amenable number.

74921616169 is a deficient number, since it is larger than the sum of its proper divisors (3445931).

74921616169 is a wasteful number, since it uses less digits than its factorization.

74921616169 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3445930.

The product of its digits is 979776, while the sum is 52.

The spelling of 74921616169 in words is "seventy-four billion, nine hundred twenty-one million, six hundred sixteen thousand, one hundred sixty-nine".