74023808556681 has 81 divisors (see below), whose sum is σ = 112147773603021. Its totient is φ = 47048522295600.

The previous prime is 74023808556637. The next prime is 74023808556707. The reversal of 74023808556681 is 18665580832047.

The square root of 74023808556681 is 8603709.

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

74023808556681 is a `hidden beast` number, since 7 + 40 + 2 + 38 + 0 + 8 + 556 + 6 + 8 + 1 = 666.

It is not a de Polignac number, because 74023808556681 - 2⁷ = 74023808556553 is a prime.

It is a super-2 number, since 2×74023808556681² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (74023808551681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 56810289876 + ... + 56810291178.

Almost surely, 2^{74023808556681} is an apocalyptic number.

74023808556681 is a gapful number since it is divisible by the number (71) formed by its first and last digit.

74023808556681 is the 8603709-th square number.

74023808556681 is the 4301855-th centered octagonal number.

It is an amenable number.

74023808556681 is a deficient number, since it is larger than the sum of its proper divisors (38123965046340).

74023808556681 is an frugal number, since it uses more digits than its factorization.

74023808556681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2816 (or 1408 counting only the distinct ones).

The product of its (nonzero) digits is 77414400, while the sum is 63.

The spelling of 74023808556681 in words is "seventy-four trillion, twenty-three billion, eight hundred eight million, five hundred fifty-six thousand, six hundred eighty-one".