67918913893 has 16 divisors (see below), whose sum is σ = 72807710976. Its totient is φ = 63132744960.

The previous prime is 67918913869. The next prime is 67918913899. The reversal of 67918913893 is 39831981976.

It is not a de Polignac number, because 67918913893 - 2³³ = 59328979301 is a prime.

It is a super-2 number, since 2×67918913893² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67918913899) 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, 601128 + ... + 705118.

It is an arithmetic number, because the mean of its divisors is an integer number (4550481936).

Almost surely, 2^67918913893 is an apocalyptic number.

It is an amenable number.

67918913893 is a deficient number, since it is larger than the sum of its proper divisors (4888797083).

67918913893 is a wasteful number, since it uses less digits than its factorization.

67918913893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104484.

The product of its digits is 17635968, while the sum is 64.

The spelling of 67918913893 in words is "sixty-seven billion, nine hundred eighteen million, nine hundred thirteen thousand, eight hundred ninety-three".