6461001641 has 4 divisors (see below), whose sum is σ = 6464206932. Its totient is φ = 6457796352.

The previous prime is 6461001637. The next prime is 6461001653. The reversal of 6461001641 is 1461001646.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3968496016 + 2492505625 = 62996^2 + 49925^2 .

It is a cyclic number.

It is not a de Polignac number, because 6461001641 - 2² = 6461001637 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6461201641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1599620 + ... + 1603653.

It is an arithmetic number, because the mean of its divisors is an integer number (1616051733).

Almost surely, 2^6461001641 is an apocalyptic number.

It is an amenable number.

6461001641 is a deficient number, since it is larger than the sum of its proper divisors (3205291).

6461001641 is a wasteful number, since it uses less digits than its factorization.

6461001641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3205290.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 6461001641 is about 80380.3560641529. The cubic root of 6461001641 is about 1862.5157349301.

The spelling of 6461001641 in words is "six billion, four hundred sixty-one million, one thousand, six hundred forty-one".