1642646226 has 16 divisors (see below), whose sum is σ = 3538007424. Its totient is φ = 505429584.

The previous prime is 1642646221. The next prime is 1642646237. The reversal of 1642646226 is 6226462461.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (1642646221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10529706 + ... + 10529861.

It is an arithmetic number, because the mean of its divisors is an integer number (221125464).

Almost surely, 2^1642646226 is an apocalyptic number.

1642646226 is an abundant number, since it is smaller than the sum of its proper divisors (1895361198).

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

1642646226 is a wasteful number, since it uses less digits than its factorization.

1642646226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21059585.

The product of its digits is 165888, while the sum is 39.

The square root of 1642646226 is about 40529.5722405258. The cubic root of 1642646226 is about 1179.9076404777.

The spelling of 1642646226 in words is "one billion, six hundred forty-two million, six hundred forty-six thousand, two hundred twenty-six".