67909939511 has 2 divisors, whose sum is σ = 67909939512. Its totient is φ = 67909939510.

The previous prime is 67909939499. The next prime is 67909939561. The reversal of 67909939511 is 11593990976.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-67909939511 is a prime.

It is a super-2 number, since 2×67909939511² (a number of 22 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (67909939561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33954969755 + 33954969756.

It is an arithmetic number, because the mean of its divisors is an integer number (33954969756).

Almost surely, 2^67909939511 is an apocalyptic number.

67909939511 is a deficient number, since it is larger than the sum of its proper divisors (1).

67909939511 is an equidigital number, since it uses as much as digits as its factorization.

67909939511 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4133430, while the sum is 59.

The spelling of 67909939511 in words is "sixty-seven billion, nine hundred nine million, nine hundred thirty-nine thousand, five hundred eleven".