72715065061 has 2 divisors, whose sum is σ = 72715065062. Its totient is φ = 72715065060.

The previous prime is 72715065047. The next prime is 72715065109. The reversal of 72715065061 is 16056051727.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 59131162561 + 13583902500 = 243169^2 + 116550^2 .

It is a cyclic number.

It is not a de Polignac number, because 72715065061 - 2¹⁷ = 72714933989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72715063061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36357532530 + 36357532531.

It is an arithmetic number, because the mean of its divisors is an integer number (36357532531).

Almost surely, 2^72715065061 is an apocalyptic number.

It is an amenable number.

72715065061 is a deficient number, since it is larger than the sum of its proper divisors (1).

72715065061 is an equidigital number, since it uses as much as digits as its factorization.

72715065061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 88200, while the sum is 40.

The spelling of 72715065061 in words is "seventy-two billion, seven hundred fifteen million, sixty-five thousand, sixty-one".