67731788797 has 4 divisors (see below), whose sum is σ = 69306946720. Its totient is φ = 66156630876.

The previous prime is 67731788743. The next prime is 67731788821. The reversal of 67731788797 is 79788713776.

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 not a de Polignac number, because 67731788797 - 2¹⁹ = 67731264509 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 (67731788737) 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, 787578897 + ... + 787578982.

It is an arithmetic number, because the mean of its divisors is an integer number (17326736680).

Almost surely, 2^67731788797 is an apocalyptic number.

It is an amenable number.

67731788797 is a deficient number, since it is larger than the sum of its proper divisors (1575157923).

67731788797 is a wasteful number, since it uses less digits than its factorization.

67731788797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1575157922.

The product of its digits is 174254976, while the sum is 70.

The spelling of 67731788797 in words is "sixty-seven billion, seven hundred thirty-one million, seven hundred eighty-eight thousand, seven hundred ninety-seven".