1642166361 has 12 divisors (see below), whose sum is σ = 2587656240. Its totient is φ = 995252280.

The previous prime is 1642166353. The next prime is 1642166381. The reversal of 1642166361 is 1636612461.

It is a happy number.

1642166361 is a `hidden beast` number, since 1 + 6 + 4 + 2 + 16 + 636 + 1 = 666.

It is not a de Polignac number, because 1642166361 - 2³ = 1642166353 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1642166311) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8293671 + ... + 8293868.

It is an arithmetic number, because the mean of its divisors is an integer number (215638020).

Almost surely, 2^1642166361 is an apocalyptic number.

1642166361 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1642166361 is a deficient number, since it is larger than the sum of its proper divisors (945489879).

1642166361 is a wasteful number, since it uses less digits than its factorization.

1642166361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16587556 (or 16587553 counting only the distinct ones).

The product of its digits is 31104, while the sum is 36.

The square root of 1642166361 is about 40523.6518714688. The cubic root of 1642166361 is about 1179.7927341122.

The spelling of 1642166361 in words is "one billion, six hundred forty-two million, one hundred sixty-six thousand, three hundred sixty-one".