67918973922 has 162 divisors, whose sum is σ = 160933802211. Its totient is φ = 20698441920.

The previous prime is 67918973917. The next prime is 67918973929. The reversal of 67918973922 is 22937981976.

67918973922 is a `hidden beast` number, since 67 + 9 + 189 + 7 + 392 + 2 = 666.

67918973922 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 5 ways, for example, as 10797495921 + 57121478001 = 103911^2 + 239001^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=184281.

It is a super-2 number, since 2×67918973922² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 67918973922.

It is not an unprimeable number, because it can be changed into a prime (67918973929) by changing a digit.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 1113425772 + ... + 1113425832.

Almost surely, 2^67918973922 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 67918973922

67918973922 is an abundant number, since it is smaller than the sum of its proper divisors (93014828289).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

67918973922 is a wasteful number, since it uses less digits than its factorization.

67918973922 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 274 (or 138 counting only the distinct ones).

The product of its digits is 20575296, while the sum is 63.

The spelling of 67918973922 in words is "sixty-seven billion, nine hundred eighteen million, nine hundred seventy-three thousand, nine hundred twenty-two".