67853638728 has 48 divisors (see below), whose sum is σ = 183888907020. Its totient is φ = 22603278336.

The previous prime is 67853638709. The next prime is 67853638777. The reversal of 67853638728 is 82783635876.

It is a happy number.

67853638728 is a `hidden beast` number, since 6 + 78 + 536 + 3 + 8 + 7 + 28 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 51500855844 + 16352782884 = 226938^2 + 127878^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 191601 + ... + 415232.

Almost surely, 2^67853638728 is an apocalyptic number.

It is an amenable number.

67853638728 is an abundant number, since it is smaller than the sum of its proper divisors (116035268292).

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

67853638728 is a wasteful number, since it uses less digits than its factorization.

67853638728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 608398 (or 608391 counting only the distinct ones).

The product of its digits is 81285120, while the sum is 63.

The spelling of 67853638728 in words is "sixty-seven billion, eight hundred fifty-three million, six hundred thirty-eight thousand, seven hundred twenty-eight".