67147838642 has 32 divisors (see below), whose sum is σ = 103728204720. Its totient is φ = 32580910080.

The previous prime is 67147838609. The next prime is 67147838657. The reversal of 67147838642 is 24683874176.

67147838642 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Cunningham number, because it is equal to 259129²+1.

It can be written as a sum of positive squares in 8 ways, for example, as 3235448161 + 63912390481 = 56881^2 + 252809^2 .

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, 16166438 + ... + 16170590.

Almost surely, 2^67147838642 is an apocalyptic number.

67147838642 is a deficient number, since it is larger than the sum of its proper divisors (36580366078).

67147838642 is a wasteful number, since it uses less digits than its factorization.

67147838642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5198.

The product of its digits is 10838016, while the sum is 56.

The spelling of 67147838642 in words is "sixty-seven billion, one hundred forty-seven million, eight hundred thirty-eight thousand, six hundred forty-two".