67715891811 has 8 divisors (see below), whose sum is σ = 100319839760. Its totient is φ = 45143927856.

The previous prime is 67715891777. The next prime is 67715891819. The reversal of 67715891811 is 11819851776.

It is not a de Polignac number, because 67715891811 - 2¹¹ = 67715889763 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (67715891819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1253997970 + ... + 1253998023.

It is an arithmetic number, because the mean of its divisors is an integer number (12539979970).

Almost surely, 2^67715891811 is an apocalyptic number.

67715891811 is a deficient number, since it is larger than the sum of its proper divisors (32603947949).

67715891811 is a wasteful number, since it uses less digits than its factorization.

67715891811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2507996002 (or 2507995996 counting only the distinct ones).

The product of its digits is 846720, while the sum is 54.

The spelling of 67715891811 in words is "sixty-seven billion, seven hundred fifteen million, eight hundred ninety-one thousand, eight hundred eleven".