79021145449 has 9 divisors (see below), whose sum is σ = 80751720151. Its totient is φ = 77326913560.

The previous prime is 79021145447. The next prime is 79021145453. The reversal of 79021145449 is 94454112097.

The square root of 79021145449 is 281107.

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

It can be written as a sum of positive squares in only one way, i.e., 2125855449 + 76895290000 = 46107^2 + 277300^2 .

It is not a de Polignac number, because 79021145449 - 2¹ = 79021145447 is a prime.

It is a super-3 number, since 3×79021145449³ (a number of 34 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 79021145399 and 79021145408.

It is not an unprimeable number, because it can be changed into a prime (79021145447) 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 8 ways as a sum of consecutive naturals, for example, 13209039 + ... + 13215019.

Almost surely, 2^79021145449 is an apocalyptic number.

79021145449 is the 281107-th square number.

79021145449 is the 140554-th centered octagonal number.

It is an amenable number.

79021145449 is a deficient number, since it is larger than the sum of its proper divisors (1730574702).

79021145449 is an frugal number, since it uses more digits than its factorization.

79021145449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12056 (or 6028 counting only the distinct ones).

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

The spelling of 79021145449 in words is "seventy-nine billion, twenty-one million, one hundred forty-five thousand, four hundred forty-nine".