72748782697 has 2 divisors, whose sum is σ = 72748782698. Its totient is φ = 72748782696.

The previous prime is 72748782637. The next prime is 72748782761. The reversal of 72748782697 is 79628784727.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 63700207321 + 9048575376 = 252389^2 + 95124^2 .

It is a cyclic number.

It is not a de Polignac number, because 72748782697 - 2⁷ = 72748782569 is a prime.

It is not a weakly prime, because it can be changed into another prime (72748782607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36374391348 + 36374391349.

It is an arithmetic number, because the mean of its divisors is an integer number (36374391349).

Almost surely, 2^72748782697 is an apocalyptic number.

It is an amenable number.

72748782697 is a deficient number, since it is larger than the sum of its proper divisors (1).

72748782697 is an equidigital number, since it uses as much as digits as its factorization.

72748782697 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 132765696, while the sum is 67.

The spelling of 72748782697 in words is "seventy-two billion, seven hundred forty-eight million, seven hundred eighty-two thousand, six hundred ninety-seven".