1644366106 has 16 divisors (see below), whose sum is σ = 2648427840. Its totient is φ = 762919360.

The previous prime is 1644366079. The next prime is 1644366109. The reversal of 1644366106 is 6016634461.

It is a super-3 number, since 3×1644366106³ (a number of 29 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (1644366109) 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, 338176 + ... + 343003.

It is an arithmetic number, because the mean of its divisors is an integer number (165526740).

Almost surely, 2^1644366106 is an apocalyptic number.

1644366106 is a deficient number, since it is larger than the sum of its proper divisors (1004061734).

1644366106 is a wasteful number, since it uses less digits than its factorization.

1644366106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 681269.

The product of its (nonzero) digits is 62208, while the sum is 37.

The square root of 1644366106 is about 40550.7842834143. The cubic root of 1644366106 is about 1180.3192916486.

The spelling of 1644366106 in words is "one billion, six hundred forty-four million, three hundred sixty-six thousand, one hundred six".