6461967784 has 32 divisors (see below), whose sum is σ = 12835811880. Its totient is φ = 3039289344.

The previous prime is 6461967769. The next prime is 6461967791. The reversal of 6461967784 is 4877691646.

It can be written as a sum of positive squares in 4 ways, for example, as 5369665284 + 1092302500 = 73278^2 + 33050^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 262534 + ... + 286090.

Almost surely, 2^6461967784 is an apocalyptic number.

It is an amenable number.

6461967784 is a deficient number, since it is larger than the sum of its proper divisors (6373844096).

6461967784 is a wasteful number, since it uses less digits than its factorization.

6461967784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25597 (or 25593 counting only the distinct ones).

The product of its digits is 12192768, while the sum is 58.

The square root of 6461967784 is about 80386.3656598555. The cubic root of 6461967784 is about 1862.6085671230.

The spelling of 6461967784 in words is "six billion, four hundred sixty-one million, nine hundred sixty-seven thousand, seven hundred eighty-four".