646001641461 has 12 divisors (see below), whose sum is σ = 946757227136. Its totient is φ = 391516146120.

The previous prime is 646001641457. The next prime is 646001641511. The reversal of 646001641461 is 164146100646.

It is not a de Polignac number, because 646001641461 - 2² = 646001641457 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 (646001641261) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 889809061 + ... + 889809786.

Almost surely, 2^646001641461 is an apocalyptic number.

It is an amenable number.

646001641461 is a deficient number, since it is larger than the sum of its proper divisors (300755585675).

646001641461 is a wasteful number, since it uses less digits than its factorization.

646001641461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1779618872 (or 1779618861 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 39.

The spelling of 646001641461 in words is "six hundred forty-six billion, one million, six hundred forty-one thousand, four hundred sixty-one".