1644162026 has 8 divisors (see below), whose sum is σ = 2655954084. Its totient is φ = 758844000.

The previous prime is 1644162019. The next prime is 1644162043. The reversal of 1644162026 is 6202614461.

It can be written as a sum of positive squares in 2 ways, for example, as 1628041801 + 16120225 = 40349^2 + 4015^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-3 number, since 3×1644162026³ (a number of 29 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1644161983 and 1644162001.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31618475 + ... + 31618526.

Almost surely, 2^1644162026 is an apocalyptic number.

1644162026 is a deficient number, since it is larger than the sum of its proper divisors (1011792058).

1644162026 is a wasteful number, since it uses less digits than its factorization.

1644162026 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63237016.

The product of its (nonzero) digits is 13824, while the sum is 32.

The square root of 1644162026 is about 40548.2678544966. The cubic root of 1644162026 is about 1180.2704603642.

Adding to 1644162026 its reverse (6202614461), we get a palindrome (7846776487).

The spelling of 1644162026 in words is "one billion, six hundred forty-four million, one hundred sixty-two thousand, twenty-six".