67431885642 has 32 divisors (see below), whose sum is σ = 163471239360. Its totient is φ = 20433904560.

The previous prime is 67431885623. The next prime is 67431885649. The reversal of 67431885642 is 24658813476.

It is a happy number.

67431885642 is a `hidden beast` number, since 6 + 74 + 3 + 1 + 8 + 8 + 564 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (67431885649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 56760253 + ... + 56761440.

It is an arithmetic number, because the mean of its divisors is an integer number (5108476230).

Almost surely, 2^67431885642 is an apocalyptic number.

67431885642 is an abundant number, since it is smaller than the sum of its proper divisors (96039353718).

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

67431885642 is a wasteful number, since it uses less digits than its factorization.

67431885642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113521715 (or 113521709 counting only the distinct ones).

The product of its digits is 7741440, while the sum is 54.

The spelling of 67431885642 in words is "sixty-seven billion, four hundred thirty-one million, eight hundred eighty-five thousand, six hundred forty-two".