67798722391 has 16 divisors (see below), whose sum is σ = 73271439360. Its totient is φ = 62585883360.

The previous prime is 67798722373. The next prime is 67798722419. The reversal of 67798722391 is 19322789776.

It is a cyclic number.

It is not a de Polignac number, because 67798722391 - 2¹¹ = 67798720343 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 (67798722191) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 379695 + ... + 528928.

It is an arithmetic number, because the mean of its divisors is an integer number (4579464960).

Almost surely, 2^67798722391 is an apocalyptic number.

67798722391 is a deficient number, since it is larger than the sum of its proper divisors (5472716969).

67798722391 is a wasteful number, since it uses less digits than its factorization.

67798722391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 908766.

The product of its digits is 16003008, while the sum is 61.

The spelling of 67798722391 in words is "sixty-seven billion, seven hundred ninety-eight million, seven hundred twenty-two thousand, three hundred ninety-one".