1642213648 has 20 divisors (see below), whose sum is σ = 3185993628. Its totient is φ = 820021760.

The previous prime is 1642213627. The next prime is 1642213649. The reversal of 1642213648 is 8463122461.

It can be written as a sum of positive squares in 2 ways, for example, as 213978384 + 1428235264 = 14628^2 + 37792^2 .

It is not an unprimeable number, because it can be changed into a prime (1642213649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55261 + ... + 79612.

Almost surely, 2^1642213648 is an apocalyptic number.

It is an amenable number.

1642213648 is a deficient number, since it is larger than the sum of its proper divisors (1543779980).

1642213648 is a wasteful number, since it uses less digits than its factorization.

1642213648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135642 (or 135636 counting only the distinct ones).

The product of its digits is 55296, while the sum is 37.

The square root of 1642213648 is about 40524.2353166596. The cubic root of 1642213648 is about 1179.8040582437.

The spelling of 1642213648 in words is "one billion, six hundred forty-two million, two hundred thirteen thousand, six hundred forty-eight".