72173363049 has 12 divisors (see below), whose sum is σ = 104510394612. Its totient is φ = 47995584000.

The previous prime is 72173363039. The next prime is 72173363117. The reversal of 72173363049 is 94036337127.

It is a happy number.

72173363049 is a `hidden beast` number, since 7 + 2 + 1 + 7 + 3 + 3 + 630 + 4 + 9 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 47248847424 + 24924515625 = 217368^2 + 157875^2 .

It is not a de Polignac number, because 72173363049 - 2⁹ = 72173362537 is a prime.

It is a super-3 number, since 3×72173363049³ (a number of 34 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 72173362995 and 72173363013.

It is not an unprimeable number, because it can be changed into a prime (72173363039) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9995472 + ... + 10002689.

It is an arithmetic number, because the mean of its divisors is an integer number (8709199551).

Almost surely, 2^72173363049 is an apocalyptic number.

It is an amenable number.

72173363049 is a deficient number, since it is larger than the sum of its proper divisors (32337031563).

72173363049 is a wasteful number, since it uses less digits than its factorization.

72173363049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19998568 (or 19998565 counting only the distinct ones).

The product of its (nonzero) digits is 571536, while the sum is 45.

The spelling of 72173363049 in words is "seventy-two billion, one hundred seventy-three million, three hundred sixty-three thousand, forty-nine".