168640057694 has 16 divisors (see below), whose sum is σ = 254490884208. Its totient is φ = 83810594112.

The previous prime is 168640057679. The next prime is 168640057723. The reversal of 168640057694 is 496750046861.

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, 199829 + ... + 614175.

It is an arithmetic number, because the mean of its divisors is an integer number (15905680263).

Almost surely, 2^168640057694 is an apocalyptic number.

168640057694 is a deficient number, since it is larger than the sum of its proper divisors (85850826514).

168640057694 is a wasteful number, since it uses less digits than its factorization.

168640057694 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 415579.

The product of its (nonzero) digits is 8709120, while the sum is 56.

The spelling of 168640057694 in words is "one hundred sixty-eight billion, six hundred forty million, fifty-seven thousand, six hundred ninety-four".