74083617521 has 4 divisors (see below), whose sum is σ = 76085877492. Its totient is φ = 72081357552.

The previous prime is 74083617493. The next prime is 74083617539. The reversal of 74083617521 is 12571638047.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12571638047 = 61 ⋅206092427.

It can be written as a sum of positive squares in 2 ways, for example, as 34460724496 + 39622893025 = 185636^2 + 199055^2 .

It is a cyclic number.

It is not a de Polignac number, because 74083617521 - 2²² = 74079423217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (74083617551) 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, 1001129930 + ... + 1001130003.

It is an arithmetic number, because the mean of its divisors is an integer number (19021469373).

Almost surely, 2^74083617521 is an apocalyptic number.

It is an amenable number.

74083617521 is a deficient number, since it is larger than the sum of its proper divisors (2002259971).

74083617521 is a wasteful number, since it uses less digits than its factorization.

74083617521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2002259970.

The product of its (nonzero) digits is 282240, while the sum is 44.

The spelling of 74083617521 in words is "seventy-four billion, eighty-three million, six hundred seventeen thousand, five hundred twenty-one".