168640057702 has 4 divisors (see below), whose sum is σ = 252960086556. Its totient is φ = 84320028850.

The previous prime is 168640057679. The next prime is 168640057723. The reversal of 168640057702 is 207750046861.

It is a happy number.

168640057702 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 42160014424 + ... + 42160014427.

It is an arithmetic number, because the mean of its divisors is an integer number (63240021639).

Almost surely, 2^168640057702 is an apocalyptic number.

168640057702 is a deficient number, since it is larger than the sum of its proper divisors (84320028854).

168640057702 is an equidigital number, since it uses as much as digits as its factorization.

168640057702 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84320028853.

The product of its (nonzero) digits is 564480, while the sum is 46.

The spelling of 168640057702 in words is "one hundred sixty-eight billion, six hundred forty million, fifty-seven thousand, seven hundred two".