73172317051 has 2 divisors, whose sum is σ = 73172317052. Its totient is φ = 73172317050.

The previous prime is 73172316989. The next prime is 73172317061. The reversal of 73172317051 is 15071327137.

It is a strong prime.

It is an emirp because it is prime and its reverse (15071327137) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 73172317051 - 2²⁹ = 72635446139 is a prime.

It is a super-2 number, since 2×73172317051² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 73172317051.

It is not a weakly prime, because it can be changed into another prime (73172317061) 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 as a sum of consecutive naturals, namely, 36586158525 + 36586158526.

It is an arithmetic number, because the mean of its divisors is an integer number (36586158526).

Almost surely, 2^73172317051 is an apocalyptic number.

73172317051 is a deficient number, since it is larger than the sum of its proper divisors (1).

73172317051 is an equidigital number, since it uses as much as digits as its factorization.

73172317051 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30870, while the sum is 37.

The spelling of 73172317051 in words is "seventy-three billion, one hundred seventy-two million, three hundred seventeen thousand, fifty-one".