67840368593 has 2 divisors, whose sum is σ = 67840368594. Its totient is φ = 67840368592.

The previous prime is 67840368553. The next prime is 67840368619. The reversal of 67840368593 is 39586304876.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 65062235329 + 2778133264 = 255073^2 + 52708^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-67840368593 is a prime.

It is a super-2 number, since 2×67840368593² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (67840368553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33920184296 + 33920184297.

It is an arithmetic number, because the mean of its divisors is an integer number (33920184297).

Almost surely, 2^67840368593 is an apocalyptic number.

It is an amenable number.

67840368593 is a deficient number, since it is larger than the sum of its proper divisors (1).

67840368593 is an equidigital number, since it uses as much as digits as its factorization.

67840368593 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 26127360, while the sum is 59.

The spelling of 67840368593 in words is "sixty-seven billion, eight hundred forty million, three hundred sixty-eight thousand, five hundred ninety-three".