67420289856 has 112 divisors (see below), whose sum is σ = 180085593600. Its totient is φ = 22259922432.

The previous prime is 67420289819. The next prime is 67420289897. The reversal of 67420289856 is 65898202476.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 67420289796 and 67420289805.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9035055 + ... + 9042513.

Almost surely, 2^67420289856 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 67420289856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90042796800).

67420289856 is an abundant number, since it is smaller than the sum of its proper divisors (112665303744).

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

67420289856 is a wasteful number, since it uses less digits than its factorization.

67420289856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7916 (or 7906 counting only the distinct ones).

The product of its (nonzero) digits is 11612160, while the sum is 57.

The spelling of 67420289856 in words is "sixty-seven billion, four hundred twenty million, two hundred eighty-nine thousand, eight hundred fifty-six".