1642982805 has 64 divisors (see below), whose sum is σ = 3064320000. Its totient is φ = 833633856.

The previous prime is 1642982773. The next prime is 1642982821. The reversal of 1642982805 is 5082892461.

It is not a de Polignac number, because 1642982805 - 2⁵ = 1642982773 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 616566 + ... + 619224.

It is an arithmetic number, because the mean of its divisors is an integer number (47880000).

Almost surely, 2^1642982805 is an apocalyptic number.

1642982805 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1642982805 is a deficient number, since it is larger than the sum of its proper divisors (1421337195).

1642982805 is a wasteful number, since it uses less digits than its factorization.

1642982805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2895 (or 2889 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 45.

The square root of 1642982805 is about 40533.7242922483. The cubic root of 1642982805 is about 1179.9882228548.

The spelling of 1642982805 in words is "one billion, six hundred forty-two million, nine hundred eighty-two thousand, eight hundred five".