72214436617 has 2 divisors, whose sum is σ = 72214436618. Its totient is φ = 72214436616.

The previous prime is 72214436557. The next prime is 72214436659. The reversal of 72214436617 is 71663441227.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 54863224441 + 17351212176 = 234229^2 + 131724^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72214436617 is a prime.

It is not a weakly prime, because it can be changed into another prime (72214436687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36107218308 + 36107218309.

It is an arithmetic number, because the mean of its divisors is an integer number (36107218309).

Almost surely, 2^72214436617 is an apocalyptic number.

It is an amenable number.

72214436617 is a deficient number, since it is larger than the sum of its proper divisors (1).

72214436617 is an equidigital number, since it uses as much as digits as its factorization.

72214436617 is an evil number, because the sum of its binary digits is even.

The product of its digits is 338688, while the sum is 43.

The spelling of 72214436617 in words is "seventy-two billion, two hundred fourteen million, four hundred thirty-six thousand, six hundred seventeen".