72150071012161 has 2 divisors, whose sum is σ = 72150071012162. Its totient is φ = 72150071012160.

The previous prime is 72150071012141. The next prime is 72150071012171. The reversal of 72150071012161 is 16121017005127.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 57292561564225 + 14857509447936 = 7569185^2 + 3854544^2 .

It is a cyclic number.

It is not a de Polignac number, because 72150071012161 - 2³³ = 72141481077569 is a prime.

It is not a weakly prime, because it can be changed into another prime (72150071012101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36075035506080 + 36075035506081.

It is an arithmetic number, because the mean of its divisors is an integer number (36075035506081).

Almost surely, 2^{72150071012161} is an apocalyptic number.

It is an amenable number.

72150071012161 is a deficient number, since it is larger than the sum of its proper divisors (1).

72150071012161 is an equidigital number, since it uses as much as digits as its factorization.

72150071012161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5880, while the sum is 34.

Adding to 72150071012161 its reverse (16121017005127), we get a palindrome (88271088017288).

The spelling of 72150071012161 in words is "seventy-two trillion, one hundred fifty billion, seventy-one million, twelve thousand, one hundred sixty-one".