15485044772173 has 2 divisors, whose sum is σ = 15485044772174. Its totient is φ = 15485044772172.

The previous prime is 15485044772137. The next prime is 15485044772231. The reversal of 15485044772173 is 37127744058451.

Together with previous prime (15485044772137) it forms an Ormiston pair, because they use the same digits, order apart.

It is an a-pointer prime, because the next prime (15485044772231) can be obtained adding 15485044772173 to its sum of digits (58).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8112397043529 + 7372647728644 = 2848227^2 + 2715262^2 .

It is an emirp because it is prime and its reverse (37127744058451) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15485044772173 is a prime.

It is a super-2 number, since 2×15485044772173² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15485044772773) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7742522386086 + 7742522386087.

It is an arithmetic number, because the mean of its divisors is an integer number (7742522386087).

Almost surely, 2^{15485044772173} is an apocalyptic number.

It is an amenable number.

15485044772173 is a deficient number, since it is larger than the sum of its proper divisors (1).

15485044772173 is an equidigital number, since it uses as much as digits as its factorization.

15485044772173 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 26342400, while the sum is 58.

The spelling of 15485044772173 in words is "fifteen trillion, four hundred eighty-five billion, forty-four million, seven hundred seventy-two thousand, one hundred seventy-three".