67718448945 has 96 divisors (see below), whose sum is σ = 138581673984. Its totient is φ = 29935180800.

The previous prime is 67718448911. The next prime is 67718448953. The reversal of 67718448945 is 54984481776.

67718448945 is a `hidden beast` number, since 6 + 7 + 71 + 84 + 489 + 4 + 5 = 666.

67718448945 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 67718448945 - 2⁶ = 67718448881 is a prime.

It is a super-2 number, since 2×67718448945² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 21022435 + ... + 21025655.

It is an arithmetic number, because the mean of its divisors is an integer number (1443559104).

Almost surely, 2^67718448945 is an apocalyptic number.

It is an amenable number.

67718448945 is an abundant number, since it is smaller than the sum of its proper divisors (70863225039).

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

67718448945 is a wasteful number, since it uses less digits than its factorization.

67718448945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5423 (or 5420 counting only the distinct ones).

The product of its digits is 54190080, while the sum is 63.

The spelling of 67718448945 in words is "sixty-seven billion, seven hundred eighteen million, four hundred forty-eight thousand, nine hundred forty-five".