1646996461 has 6 divisors (see below), whose sum is σ = 1810335086. Its totient is φ = 1497269400.

The previous prime is 1646996441. The next prime is 1646996521.

1646996461 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in only one way, i.e., 917726436 + 729270025 = 30294^2 + 27005^2 .

It is not a de Polignac number, because 1646996461 - 2¹¹ = 1646994413 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1646996399 and 1646996408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1646996441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6805650 + ... + 6805891.

Almost surely, 2^1646996461 is an apocalyptic number.

1646996461 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1646996461 is a deficient number, since it is larger than the sum of its proper divisors (163338625).

1646996461 is a wasteful number, since it uses less digits than its factorization.

1646996461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13611563 (or 13611552 counting only the distinct ones).

The product of its digits is 1679616, while the sum is 52.

The square root of 1646996461 is about 40583.2041736480. The cubic root of 1646996461 is about 1180.9483090731.

The spelling of 1646996461 in words is "one billion, six hundred forty-six million, nine hundred ninety-six thousand, four hundred sixty-one".