68042541638 has 16 divisors (see below), whose sum is σ = 110901258240. Its totient is φ = 31190977800.

The previous prime is 68042541587. The next prime is 68042541659. The reversal of 68042541638 is 83614524086.

It is a junction number, because it is equal to n+sod(n) for n = 68042541592 and 68042541601.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28879358 + ... + 28881713.

It is an arithmetic number, because the mean of its divisors is an integer number (6931328640).

Almost surely, 2^68042541638 is an apocalyptic number.

68042541638 is a deficient number, since it is larger than the sum of its proper divisors (42858716602).

68042541638 is a wasteful number, since it uses less digits than its factorization.

68042541638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57761123.

The product of its (nonzero) digits is 1105920, while the sum is 47.

The spelling of 68042541638 in words is "sixty-eight billion, forty-two million, five hundred forty-one thousand, six hundred thirty-eight".