67424785281 has 12 divisors (see below), whose sum is σ = 111304407552. Its totient is φ = 38528448696.

The previous prime is 67424785247. The next prime is 67424785303. The reversal of 67424785281 is 18258742476.

67424785281 is a `hidden beast` number, since 6 + 7 + 42 + 4 + 78 + 528 + 1 = 666.

67424785281 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 67424785281 - 2⁹ = 67424784769 is a prime.

It is a super-2 number, since 2×67424785281² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (67424783281) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 535117281 + ... + 535117406.

It is an arithmetic number, because the mean of its divisors is an integer number (9275367296).

Almost surely, 2^67424785281 is an apocalyptic number.

It is an amenable number.

67424785281 is a deficient number, since it is larger than the sum of its proper divisors (43879622271).

67424785281 is a wasteful number, since it uses less digits than its factorization.

67424785281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1070234700 (or 1070234697 counting only the distinct ones).

The product of its digits is 6021120, while the sum is 54.

It can be divided in two parts, 674247 and 85281, that added together give a triangular number (759528 = T₁₂₃₂).

The spelling of 67424785281 in words is "sixty-seven billion, four hundred twenty-four million, seven hundred eighty-five thousand, two hundred eighty-one".