74522994121 has 3 divisors (see below), whose sum is σ = 74523267111. Its totient is φ = 74522721132.

The previous prime is 74522994107. The next prime is 74522994181. The reversal of 74522994121 is 12149922547.

The square root of 74522994121 is 272989.

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 can be written as a sum of positive squares in only one way, i.e., 1525761721 + 72997232400 = 39061^2 + 270180^2 .

It is not a de Polignac number, because 74522994121 - 2⁵ = 74522994089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (74522994101) 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 2 ways as a sum of consecutive naturals, for example, 136495 + ... + 409483.

It is an arithmetic number, because the mean of its divisors is an integer number (24841089037).

Almost surely, 2^74522994121 is an apocalyptic number.

74522994121 is the 272989-th square number.

74522994121 is the 136495-th centered octagonal number.

It is an amenable number.

74522994121 is a deficient number, since it is larger than the sum of its proper divisors (272990).

74522994121 is an frugal number, since it uses more digits than its factorization.

74522994121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 545978 (or 272989 counting only the distinct ones).

The product of its digits is 362880, while the sum is 46.

The spelling of 74522994121 in words is "seventy-four billion, five hundred twenty-two million, nine hundred ninety-four thousand, one hundred twenty-one".