67773671813 has 4 divisors (see below), whose sum is σ = 67785260928. Its totient is φ = 67762082700.

The previous prime is 67773671761. The next prime is 67773671831. The reversal of 67773671813 is 31817637776.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-67773671813 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67773671873) 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 3 ways as a sum of consecutive naturals, for example, 5785781 + ... + 5797482.

It is an arithmetic number, because the mean of its divisors is an integer number (16946315232).

Almost surely, 2^67773671813 is an apocalyptic number.

It is an amenable number.

67773671813 is a deficient number, since it is larger than the sum of its proper divisors (11589115).

67773671813 is a wasteful number, since it uses less digits than its factorization.

67773671813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11589114.

The product of its digits is 6223392, while the sum is 56.

The spelling of 67773671813 in words is "sixty-seven billion, seven hundred seventy-three million, six hundred seventy-one thousand, eight hundred thirteen".