74879396881 has 3 divisors (see below), whose sum is σ = 74879670523. Its totient is φ = 74879123240.

The previous prime is 74879396833. The next prime is 74879396909. The reversal of 74879396881 is 18869397847.

The square root of 74879396881 is 273641.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 18869397847 = 137 ⋅137732831.

It can be written as a sum of positive squares in only one way, i.e., 38733782481 + 36145614400 = 196809^2 + 190120^2 .

It is not a de Polignac number, because 74879396881 - 2¹⁵ = 74879364113 is a prime.

It is a super-2 number, since 2×74879396881² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 74879396881.

It is not an unprimeable number, because it can be changed into a prime (74879396831) 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 2 ways as a sum of consecutive naturals, for example, 136821 + ... + 410461.

Almost surely, 2^74879396881 is an apocalyptic number.

74879396881 is the 273641-st square number.

74879396881 is the 136821-st centered octagonal number.

It is an amenable number.

74879396881 is a deficient number, since it is larger than the sum of its proper divisors (273642).

74879396881 is an frugal number, since it uses more digits than its factorization.

74879396881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 547282 (or 273641 counting only the distinct ones).

The product of its digits is 146313216, while the sum is 70.

The spelling of 74879396881 in words is "seventy-four billion, eight hundred seventy-nine million, three hundred ninety-six thousand, eight hundred eighty-one".