168706779493 has 16 divisors (see below), whose sum is σ = 198606463744. Its totient is φ = 140279973120.

The previous prime is 168706779469. The next prime is 168706779497. The reversal of 168706779493 is 394977607861.

It is not a de Polignac number, because 168706779493 - 2²⁹ = 168169908581 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168706779497) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 879153 + ... + 1053718.

It is an arithmetic number, because the mean of its divisors is an integer number (12412903984).

Almost surely, 2^168706779493 is an apocalyptic number.

It is an amenable number.

168706779493 is a deficient number, since it is larger than the sum of its proper divisors (29899684251).

168706779493 is a wasteful number, since it uses less digits than its factorization.

168706779493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1933252.

The product of its (nonzero) digits is 96018048, while the sum is 67.

The spelling of 168706779493 in words is "one hundred sixty-eight billion, seven hundred six million, seven hundred seventy-nine thousand, four hundred ninety-three".