1642166256 has 20 divisors (see below), whose sum is σ = 4242262952. Its totient is φ = 547388736.

The previous prime is 1642166233. The next prime is 1642166263. The reversal of 1642166256 is 6526612461.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17105851 + ... + 17105946.

Almost surely, 2^1642166256 is an apocalyptic number.

1642166256 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1642166256 is an abundant number, since it is smaller than the sum of its proper divisors (2600096696).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1642166256 is a wasteful number, since it uses less digits than its factorization.

1642166256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34211808 (or 34211802 counting only the distinct ones).

The product of its digits is 103680, while the sum is 39.

The square root of 1642166256 is about 40523.6505759291. The cubic root of 1642166256 is about 1179.7927089669.

The spelling of 1642166256 in words is "one billion, six hundred forty-two million, one hundred sixty-six thousand, two hundred fifty-six".