168778142 has 32 divisors (see below), whose sum is σ = 289723392. Its totient is φ = 73050624.

The previous prime is 168778133. The next prime is 168778177. The reversal of 168778142 is 241877861.

It is a super-2 number, since 2×168778142² = 56972122433944328, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 168778093 and 168778102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 168788 + ... + 169784.

It is an arithmetic number, because the mean of its divisors is an integer number (9053856).

Almost surely, 2^168778142 is an apocalyptic number.

168778142 is a deficient number, since it is larger than the sum of its proper divisors (120945250).

168778142 is a wasteful number, since it uses less digits than its factorization.

168778142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1412.

The product of its digits is 150528, while the sum is 44.

The square root of 168778142 is about 12991.4641976953. The cubic root of 168778142 is about 552.6354419077.

The spelling of 168778142 in words is "one hundred sixty-eight million, seven hundred seventy-eight thousand, one hundred forty-two".