67918749493 has 32 divisors (see below), whose sum is σ = 81862443008. Its totient is φ = 55127952000.

The previous prime is 67918749491. The next prime is 67918749541. The reversal of 67918749493 is 39494781976.

It is a cyclic number.

It is not a de Polignac number, because 67918749493 - 2¹ = 67918749491 is a prime.

It is a super-3 number, since 3×67918749493³ (a number of 33 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (67).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67918749491) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2179921 + ... + 2210857.

It is an arithmetic number, because the mean of its divisors is an integer number (2558201344).

Almost surely, 2^67918749493 is an apocalyptic number.

It is an amenable number.

67918749493 is a deficient number, since it is larger than the sum of its proper divisors (13943693515).

67918749493 is a wasteful number, since it uses less digits than its factorization.

67918749493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31193.

The product of its digits is 82301184, while the sum is 67.

The spelling of 67918749493 in words is "sixty-seven billion, nine hundred eighteen million, seven hundred forty-nine thousand, four hundred ninety-three".