12535772173 has 2 divisors, whose sum is σ = 12535772174. Its totient is φ = 12535772172.

The previous prime is 12535772153. The next prime is 12535772189. The reversal of 12535772173 is 37127753521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9873005769 + 2662766404 = 99363^2 + 51602^2 .

It is an emirp because it is prime and its reverse (37127753521) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12535772173 is a prime.

It is a super-2 number, since 2×12535772173² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12535772153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6267886086 + 6267886087.

It is an arithmetic number, because the mean of its divisors is an integer number (6267886087).

Almost surely, 2^12535772173 is an apocalyptic number.

It is an amenable number.

12535772173 is a deficient number, since it is larger than the sum of its proper divisors (1).

12535772173 is an equidigital number, since it uses as much as digits as its factorization.

12535772173 is an evil number, because the sum of its binary digits is even.

The product of its digits is 308700, while the sum is 43.

The spelling of 12535772173 in words is "twelve billion, five hundred thirty-five million, seven hundred seventy-two thousand, one hundred seventy-three".