1646006461 has 16 divisors (see below), whose sum is σ = 1895178240. Its totient is φ = 1413843120.

The previous prime is 1646006441. The next prime is 1646006471.

1646006461 is nontrivially palindromic in base 10.

It is a cyclic number.

It is not a de Polignac number, because 1646006461 - 2¹⁷ = 1645875389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1646006441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 69766 + ... + 90328.

It is an arithmetic number, because the mean of its divisors is an integer number (118448640).

Almost surely, 2^1646006461 is an apocalyptic number.

1646006461 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1646006461 is a deficient number, since it is larger than the sum of its proper divisors (249171779).

1646006461 is a wasteful number, since it uses less digits than its factorization.

1646006461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20976.

The product of its (nonzero) digits is 20736, while the sum is 34.

The square root of 1646006461 is about 40571.0051761107. The cubic root of 1646006461 is about 1180.7116412587.

The spelling of 1646006461 in words is "one billion, six hundred forty-six million, six thousand, four hundred sixty-one".