6461431865 has 8 divisors (see below), whose sum is σ = 8861392320. Its totient is φ = 4430696112.

The previous prime is 6461431853. The next prime is 6461431871. The reversal of 6461431865 is 5681341646.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6461431865 - 2¹² = 6461427769 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 92306135 + ... + 92306204.

It is an arithmetic number, because the mean of its divisors is an integer number (1107674040).

Almost surely, 2^6461431865 is an apocalyptic number.

It is an amenable number.

6461431865 is a deficient number, since it is larger than the sum of its proper divisors (2399960455).

6461431865 is a wasteful number, since it uses less digits than its factorization.

6461431865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184612351.

The product of its digits is 414720, while the sum is 44.

The square root of 6461431865 is about 80383.0321958559. The cubic root of 6461431865 is about 1862.5570742986.

The spelling of 6461431865 in words is "six billion, four hundred sixty-one million, four hundred thirty-one thousand, eight hundred sixty-five".