168957921284 has 12 divisors (see below), whose sum is σ = 313069089564. Its totient is φ = 79509609984.

The previous prime is 168957921277. The next prime is 168957921299. The reversal of 168957921284 is 482129759861.

It can be written as a sum of positive squares in 2 ways, for example, as 81294554884 + 87663366400 = 285122^2 + 296080^2 .

It is a super-2 number, since 2×168957921284² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1242337589 + ... + 1242337724.

It is an arithmetic number, because the mean of its divisors is an integer number (26089090797).

Almost surely, 2^168957921284 is an apocalyptic number.

It is an amenable number.

168957921284 is a deficient number, since it is larger than the sum of its proper divisors (144111168280).

168957921284 is a wasteful number, since it uses less digits than its factorization.

168957921284 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2484675334 (or 2484675332 counting only the distinct ones).

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

The spelling of 168957921284 in words is "one hundred sixty-eight billion, nine hundred fifty-seven million, nine hundred twenty-one thousand, two hundred eighty-four".