72742497534517 has 2 divisors, whose sum is σ = 72742497534518. Its totient is φ = 72742497534516.

The previous prime is 72742497534491. The next prime is 72742497534527. The reversal of 72742497534517 is 71543579424727.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 68856903576036 + 3885593958481 = 8298006^2 + 1971191^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72742497534517 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72742497534527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36371248767258 + 36371248767259.

It is an arithmetic number, because the mean of its divisors is an integer number (36371248767259).

Almost surely, 2^{72742497534517} is an apocalyptic number.

It is an amenable number.

72742497534517 is a deficient number, since it is larger than the sum of its proper divisors (1).

72742497534517 is an equidigital number, since it uses as much as digits as its factorization.

72742497534517 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 414892800, while the sum is 67.

The spelling of 72742497534517 in words is "seventy-two trillion, seven hundred forty-two billion, four hundred ninety-seven million, five hundred thirty-four thousand, five hundred seventeen".