72163560241061 has 2 divisors, whose sum is σ = 72163560241062. Its totient is φ = 72163560241060.

The previous prime is 72163560241043. The next prime is 72163560241063. The reversal of 72163560241061 is 16014206536127.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 70122519418561 + 2041040822500 = 8373919^2 + 1428650^2 .

It is a cyclic number.

It is not a de Polignac number, because 72163560241061 - 2²⁶ = 72163493132197 is a prime.

Together with 72163560241063, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72163560241063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36081780120530 + 36081780120531.

It is an arithmetic number, because the mean of its divisors is an integer number (36081780120531).

Almost surely, 2^{72163560241061} is an apocalyptic number.

It is an amenable number.

72163560241061 is a deficient number, since it is larger than the sum of its proper divisors (1).

72163560241061 is an equidigital number, since it uses as much as digits as its factorization.

72163560241061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 362880, while the sum is 44.

Adding to 72163560241061 its reverse (16014206536127), we get a palindrome (88177766777188).

The spelling of 72163560241061 in words is "seventy-two trillion, one hundred sixty-three billion, five hundred sixty million, two hundred forty-one thousand, sixty-one".