77038272217 has 2 divisors, whose sum is σ = 77038272218. Its totient is φ = 77038272216.

The previous prime is 77038272167. The next prime is 77038272229. The reversal of 77038272217 is 71227283077.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 41113239696 + 35925032521 = 202764^2 + 189539^2 .

It is a cyclic number.

It is not a de Polignac number, because 77038272217 - 2¹⁵ = 77038239449 is a prime.

It is not a weakly prime, because it can be changed into another prime (77038272257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38519136108 + 38519136109.

It is an arithmetic number, because the mean of its divisors is an integer number (38519136109).

Almost surely, 2^77038272217 is an apocalyptic number.

It is an amenable number.

77038272217 is a deficient number, since it is larger than the sum of its proper divisors (1).

77038272217 is an equidigital number, since it uses as much as digits as its factorization.

77038272217 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 460992, while the sum is 46.

The spelling of 77038272217 in words is "seventy-seven billion, thirty-eight million, two hundred seventy-two thousand, two hundred seventeen".