73436518779121 has 3 divisors (see below), whose sum is σ = 73436527348633. Its totient is φ = 73436510209610.

The previous prime is 73436518779089. The next prime is 73436518779133. The reversal of 73436518779121 is 12197781563437.

The square root of 73436518779121 is 8569511.

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 not a de Polignac number, because 73436518779121 - 2⁵ = 73436518779089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (73436518777121) 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, 4284756 + ... + 12854266.

Almost surely, 2^{73436518779121} is an apocalyptic number.

73436518779121 is the 8569511-st square number.

73436518779121 is the 4284756-th centered octagonal number.

It is an amenable number.

73436518779121 is a deficient number, since it is larger than the sum of its proper divisors (8569512).

73436518779121 is an frugal number, since it uses more digits than its factorization.

73436518779121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17139022 (or 8569511 counting only the distinct ones).

The product of its digits is 53343360, while the sum is 64.

The spelling of 73436518779121 in words is "seventy-three trillion, four hundred thirty-six billion, five hundred eighteen million, seven hundred seventy-nine thousand, one hundred twenty-one".