646464261241 has 16 divisors (see below), whose sum is σ = 663429761280. Its totient is φ = 629589018240.

The previous prime is 646464261229. The next prime is 646464261251. The reversal of 646464261241 is 142162464646.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-646464261241 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 646464261191 and 646464261200.

It is not an unprimeable number, because it can be changed into a prime (646464261221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23262831 + ... + 23290603.

It is an arithmetic number, because the mean of its divisors is an integer number (41464360080).

Almost surely, 2^646464261241 is an apocalyptic number.

It is an amenable number.

646464261241 is a deficient number, since it is larger than the sum of its proper divisors (16965500039).

646464261241 is a wasteful number, since it uses less digits than its factorization.

646464261241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29376.

The product of its digits is 1327104, while the sum is 46.

The spelling of 646464261241 in words is "six hundred forty-six billion, four hundred sixty-four million, two hundred sixty-one thousand, two hundred forty-one".