67723808639 has 4 divisors (see below), whose sum is σ = 71288219640. Its totient is φ = 64159397640.

The previous prime is 67723808611. The next prime is 67723808657. The reversal of 67723808639 is 93680832776.

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 67723808639 - 2¹⁶ = 67723743103 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67723808699) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1782205472 + ... + 1782205509.

It is an arithmetic number, because the mean of its divisors is an integer number (17822054910).

Almost surely, 2^67723808639 is an apocalyptic number.

67723808639 is a deficient number, since it is larger than the sum of its proper divisors (3564411001).

67723808639 is a wasteful number, since it uses less digits than its factorization.

67723808639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3564411000.

The product of its (nonzero) digits is 18289152, while the sum is 59.

The spelling of 67723808639 in words is "sixty-seven billion, seven hundred twenty-three million, eight hundred eight thousand, six hundred thirty-nine".