67575781811 has 4 divisors (see below), whose sum is σ = 67652836032. Its totient is φ = 67498727592.

The previous prime is 67575781769. The next prime is 67575781877. The reversal of 67575781811 is 11818757576.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 67575781811 - 2¹⁸ = 67575519667 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (67575781111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38525795 + ... + 38527548.

It is an arithmetic number, because the mean of its divisors is an integer number (16913209008).

Almost surely, 2^67575781811 is an apocalyptic number.

67575781811 is a deficient number, since it is larger than the sum of its proper divisors (77054221).

67575781811 is an equidigital number, since it uses as much as digits as its factorization.

67575781811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77054220.

The product of its digits is 3292800, while the sum is 56.

The spelling of 67575781811 in words is "sixty-seven billion, five hundred seventy-five million, seven hundred eighty-one thousand, eight hundred eleven".