168425917685 has 16 divisors (see below), whose sum is σ = 209099251440. Its totient is φ = 130082803200.

The previous prime is 168425917663. The next prime is 168425917687. The reversal of 168425917685 is 586719524861.

It can be written as a sum of positive squares in 8 ways, for example, as 32206609444 + 136219308241 = 179462^2 + 369079^2 .

It is not a de Polignac number, because 168425917685 - 2³⁴ = 151246048501 is a prime.

It is a super-3 number, since 3×168425917685³ (a number of 35 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168425917687) 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, 1788785 + ... + 1880585.

It is an arithmetic number, because the mean of its divisors is an integer number (13068703215).

Almost surely, 2^168425917685 is an apocalyptic number.

It is an amenable number.

168425917685 is a deficient number, since it is larger than the sum of its proper divisors (40673333755).

168425917685 is a wasteful number, since it uses less digits than its factorization.

168425917685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104488.

The product of its digits is 29030400, while the sum is 62.

The spelling of 168425917685 in words is "one hundred sixty-eight billion, four hundred twenty-five million, nine hundred seventeen thousand, six hundred eighty-five".