67745727551 has 4 divisors (see below), whose sum is σ = 67750200000. Its totient is φ = 67741255104.

The previous prime is 67745727529. The next prime is 67745727557. The reversal of 67745727551 is 15572754776.

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 67745727551 - 2¹⁴ = 67745711167 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 (67745727557) 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, 2213426 + ... + 2243823.

It is an arithmetic number, because the mean of its divisors is an integer number (16937550000).

Almost surely, 2^67745727551 is an apocalyptic number.

67745727551 is a deficient number, since it is larger than the sum of its proper divisors (4472449).

67745727551 is a wasteful number, since it uses less digits than its factorization.

67745727551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4472448.

The product of its digits is 14406000, while the sum is 56.

The spelling of 67745727551 in words is "sixty-seven billion, seven hundred forty-five million, seven hundred twenty-seven thousand, five hundred fifty-one".