72603841517 has 2 divisors, whose sum is σ = 72603841518. Its totient is φ = 72603841516.

The previous prime is 72603841379. The next prime is 72603841537. The reversal of 72603841517 is 71514830627.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 71777911396 + 825930121 = 267914^2 + 28739^2 .

It is a cyclic number.

It is not a de Polignac number, because 72603841517 - 2²⁴ = 72587064301 is a prime.

It is a super-2 number, since 2×72603841517² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72603841537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36301920758 + 36301920759.

It is an arithmetic number, because the mean of its divisors is an integer number (36301920759).

Almost surely, 2^72603841517 is an apocalyptic number.

It is an amenable number.

72603841517 is a deficient number, since it is larger than the sum of its proper divisors (1).

72603841517 is an equidigital number, since it uses as much as digits as its factorization.

72603841517 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 282240, while the sum is 44.

The spelling of 72603841517 in words is "seventy-two billion, six hundred three million, eight hundred forty-one thousand, five hundred seventeen".