1644672130 has 8 divisors (see below), whose sum is σ = 2960409852. Its totient is φ = 657868848.

The previous prime is 1644672103. The next prime is 1644672131. The reversal of 1644672130 is 312764461.

It can be written as a sum of positive squares in 2 ways, for example, as 1394051569 + 250620561 = 37337^2 + 15831^2 .

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

It is not an unprimeable number, because it can be changed into a prime (1644672131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 82233597 + ... + 82233616.

Almost surely, 2^1644672130 is an apocalyptic number.

1644672130 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1644672130 is a deficient number, since it is larger than the sum of its proper divisors (1315737722).

1644672130 is a wasteful number, since it uses less digits than its factorization.

1644672130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164467220.

The product of its (nonzero) digits is 24192, while the sum is 34.

The square root of 1644672130 is about 40554.5574504272. The cubic root of 1644672130 is about 1180.3925080336.

The spelling of 1644672130 in words is "one billion, six hundred forty-four million, six hundred seventy-two thousand, one hundred thirty".