1646644126 has 16 divisors (see below), whose sum is σ = 2547939600. Its totient is φ = 797734080.

The previous prime is 1646644073. The next prime is 1646644127. The reversal of 1646644126 is 6214466461.

It is a super-2 number, since 2×1646644126² = 5422873755380607752, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1646644127) 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, 92551 + ... + 108898.

It is an arithmetic number, because the mean of its divisors is an integer number (159246225).

Almost surely, 2^1646644126 is an apocalyptic number.

1646644126 is a deficient number, since it is larger than the sum of its proper divisors (901295474).

1646644126 is a wasteful number, since it uses less digits than its factorization.

1646644126 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201579.

The product of its digits is 165888, while the sum is 40.

The square root of 1646644126 is about 40578.8630446936. The cubic root of 1646644126 is about 1180.8640913053.

The spelling of 1646644126 in words is "one billion, six hundred forty-six million, six hundred forty-four thousand, one hundred twenty-six".