542668169 has 16 divisors (see below), whose sum is σ = 594397440. Its totient is φ = 493386240.

The previous prime is 542668129. The next prime is 542668183. The reversal of 542668169 is 961866245.

It is not a de Polignac number, because 542668169 - 2²⁰ = 541619593 is a prime.

It is a super-2 number, since 2×542668169² = 588977483291625122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (542668109) 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, 68012 + ... + 75570.

It is an arithmetic number, because the mean of its divisors is an integer number (37149840).

Almost surely, 2^542668169 is an apocalyptic number.

It is an amenable number.

542668169 is a deficient number, since it is larger than the sum of its proper divisors (51729271).

542668169 is a wasteful number, since it uses less digits than its factorization.

542668169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7720.

The product of its digits is 622080, while the sum is 47.

The square root of 542668169 is about 23295.2391917319. The cubic root of 542668169 is about 815.6642903500.

The spelling of 542668169 in words is "five hundred forty-two million, six hundred sixty-eight thousand, one hundred sixty-nine".