386623967617 has 2 divisors, whose sum is σ = 386623967618. Its totient is φ = 386623967616.

The previous prime is 386623967591. The next prime is 386623967647. The reversal of 386623967617 is 716769326683.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 386546949441 + 77018176 = 621729^2 + 8776^2 .

It is a cyclic number.

It is not a de Polignac number, because 386623967617 - 2²⁷ = 386489749889 is a prime.

It is a super-2 number, since 2×386623967617² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (386623967647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 193311983808 + 193311983809.

It is an arithmetic number, because the mean of its divisors is an integer number (193311983809).

Almost surely, 2^386623967617 is an apocalyptic number.

It is an amenable number.

386623967617 is a deficient number, since it is larger than the sum of its proper divisors (1).

386623967617 is an equidigital number, since it uses as much as digits as its factorization.

386623967617 is an evil number, because the sum of its binary digits is even.

The product of its digits is 82301184, while the sum is 64.

The spelling of 386623967617 in words is "three hundred eighty-six billion, six hundred twenty-three million, nine hundred sixty-seven thousand, six hundred seventeen".