74386672581 has 16 divisors (see below), whose sum is σ = 107591287104. Its totient is φ = 45442276224.

The previous prime is 74386672579. The next prime is 74386672601. The reversal of 74386672581 is 18527668347.

It is not a de Polignac number, because 74386672581 - 2¹ = 74386672579 is a prime.

It is a super-2 number, since 2×74386672581² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74386672181) 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, 6955791 + ... + 6966476.

It is an arithmetic number, because the mean of its divisors is an integer number (6724455444).

Almost surely, 2^74386672581 is an apocalyptic number.

It is an amenable number.

74386672581 is a deficient number, since it is larger than the sum of its proper divisors (33204614523).

74386672581 is a wasteful number, since it uses less digits than its factorization.

74386672581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13922420.

The product of its digits is 13547520, while the sum is 57.

The spelling of 74386672581 in words is "seventy-four billion, three hundred eighty-six million, six hundred seventy-two thousand, five hundred eighty-one".