6461523565 has 16 divisors (see below), whose sum is σ = 8952878592. Its totient is φ = 4385078784.

The previous prime is 6461523547. The next prime is 6461523571. The reversal of 6461523565 is 5653251646.

It is a cyclic number.

It is not a de Polignac number, because 6461523565 - 2⁹ = 6461523053 is a prime.

It is a congruent number.

It is an unprimeable number.

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, 948229 + ... + 955018.

It is an arithmetic number, because the mean of its divisors is an integer number (559554912).

Almost surely, 2^6461523565 is an apocalyptic number.

It is an amenable number.

6461523565 is a deficient number, since it is larger than the sum of its proper divisors (2491355027).

6461523565 is a wasteful number, since it uses less digits than its factorization.

6461523565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1903356.

The product of its digits is 648000, while the sum is 43.

The square root of 6461523565 is about 80383.6025878413. The cubic root of 6461523565 is about 1862.5658853320.

The spelling of 6461523565 in words is "six billion, four hundred sixty-one million, five hundred twenty-three thousand, five hundred sixty-five".