1646056161 has 40 divisors (see below), whose sum is σ = 2617084800. Its totient is φ = 1027458432.

The previous prime is 1646056129. The next prime is 1646056169. The reversal of 1646056161 is 1616506461.

It is a happy number.

1646056161 is a `hidden beast` number, since 1 + 646 + 0 + 5 + 6 + 1 + 6 + 1 = 666.

It is not a de Polignac number, because 1646056161 - 2⁵ = 1646056129 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1646056169) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 271020 + ... + 277026.

It is an arithmetic number, because the mean of its divisors is an integer number (65427120).

Almost surely, 2^1646056161 is an apocalyptic number.

It is an amenable number.

1646056161 is a deficient number, since it is larger than the sum of its proper divisors (971028639).

1646056161 is a wasteful number, since it uses less digits than its factorization.

1646056161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6235 (or 6226 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 1646056161 is about 40571.6176778792. The cubic root of 1646056161 is about 1180.7235247232.

The spelling of 1646056161 in words is "one billion, six hundred forty-six million, fifty-six thousand, one hundred sixty-one".