74560789949881 has 3 divisors (see below), whose sum is σ = 74560798584741. Its totient is φ = 74560781315022.

The previous prime is 74560789949839. The next prime is 74560789949957. The reversal of 74560789949881 is 18894998706547.

The square root of 74560789949881 is 8634859.

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.

It is a de Polignac number, because none of the positive numbers 2^k-74560789949881 is a prime.

It is a super-2 number, since 2×74560789949881² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (74560789949981) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 4317430 + ... + 12952288.

It is an arithmetic number, because the mean of its divisors is an integer number (24853599528247).

Almost surely, 2^{74560789949881} is an apocalyptic number.

74560789949881 is the 8634859-th square number.

74560789949881 is the 4317430-th centered octagonal number.

It is an amenable number.

74560789949881 is a deficient number, since it is larger than the sum of its proper divisors (8634860).

74560789949881 is an frugal number, since it uses more digits than its factorization.

74560789949881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17269718 (or 8634859 counting only the distinct ones).

The product of its (nonzero) digits is 8778792960, while the sum is 85.

The spelling of 74560789949881 in words is "seventy-four trillion, five hundred sixty billion, seven hundred eighty-nine million, nine hundred forty-nine thousand, eight hundred eighty-one".