1642883645 has 32 divisors (see below), whose sum is σ = 2146798080. Its totient is φ = 1206903360.

The previous prime is 1642883633. The next prime is 1642883677. The reversal of 1642883645 is 5463882461.

1642883645 = T₄₀₀₇ + T₄₀₀₈ + ... + T₄₂₀₁.

It is not a de Polignac number, because 1642883645 - 2¹⁸ = 1642621501 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1642883645.

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 31 ways as a sum of consecutive naturals, for example, 3811580 + ... + 3812010.

It is an arithmetic number, because the mean of its divisors is an integer number (67087440).

Almost surely, 2^1642883645 is an apocalyptic number.

It is an amenable number.

1642883645 is a deficient number, since it is larger than the sum of its proper divisors (503914435).

1642883645 is an equidigital number, since it uses as much as digits as its factorization.

1642883645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 822 (or 796 counting only the distinct ones).

The product of its digits is 1105920, while the sum is 47.

The square root of 1642883645 is about 40532.5010948005. The cubic root of 1642883645 is about 1179.9644835140.

The spelling of 1642883645 in words is "one billion, six hundred forty-two million, eight hundred eighty-three thousand, six hundred forty-five".