1646656134841 has 9 divisors (see below), whose sum is σ = 1705433896621. Its totient is φ = 1589838958624.

The previous prime is 1646656134743. The next prime is 1646656134883. The reversal of 1646656134841 is 1484316566461.

It is a happy number.

The square root of 1646656134841 is 1283221.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 597793395241 + 1048862739600 = 773171^2 + 1024140^2 .

It is not a de Polignac number, because 1646656134841 - 2⁷ = 1646656134713 is a prime.

It is a super-2 number, since 2×1646656134841² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1646656134041) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 37191285 + ... + 37235533.

Almost surely, 2^{1646656134841} is an apocalyptic number.

1646656134841 is the 1283221-st square number.

1646656134841 is the 641611-st centered octagonal number.

It is an amenable number.

1646656134841 is a deficient number, since it is larger than the sum of its proper divisors (58777761780).

1646656134841 is an frugal number, since it uses more digits than its factorization.

1646656134841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88556 (or 44278 counting only the distinct ones).

The product of its digits is 9953280, while the sum is 55.

The spelling of 1646656134841 in words is "one trillion, six hundred forty-six billion, six hundred fifty-six million, one hundred thirty-four thousand, eight hundred forty-one".