168259971428 has 24 divisors (see below), whose sum is σ = 294824376000. Its totient is φ = 84024489888.

The previous prime is 168259971427. The next prime is 168259971431. The reversal of 168259971428 is 824179952861.

It is a super-2 number, since 2×168259971428² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (168259971421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26709023 + ... + 26715321.

It is an arithmetic number, because the mean of its divisors is an integer number (12284349000).

Almost surely, 2^168259971428 is an apocalyptic number.

It is an amenable number.

168259971428 is a deficient number, since it is larger than the sum of its proper divisors (126564404572).

168259971428 is a wasteful number, since it uses less digits than its factorization.

168259971428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13619 (or 13617 counting only the distinct ones).

The product of its digits is 17418240, while the sum is 62.

The spelling of 168259971428 in words is "one hundred sixty-eight billion, two hundred fifty-nine million, nine hundred seventy-one thousand, four hundred twenty-eight".