6407721063 has 12 divisors (see below), whose sum is σ = 9742734040. Its totient is φ = 4046981616.

The previous prime is 6407721037. The next prime is 6407721127. The reversal of 6407721063 is 3601277046.

6407721063 is a `hidden beast` number, since 640 + 7 + 7 + 2 + 1 + 0 + 6 + 3 = 666.

It is not a de Polignac number, because 6407721063 - 2⁶ = 6407720999 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 (6407720063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18735856 + ... + 18736197.

Almost surely, 2^6407721063 is an apocalyptic number.

6407721063 is a deficient number, since it is larger than the sum of its proper divisors (3335012977).

6407721063 is a wasteful number, since it uses less digits than its factorization.

6407721063 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37472078 (or 37472075 counting only the distinct ones).

The product of its (nonzero) digits is 42336, while the sum is 36.

The square root of 6407721063 is about 80048.2420981248. The cubic root of 6407721063 is about 1857.3818583953.

The spelling of 6407721063 in words is "six billion, four hundred seven million, seven hundred twenty-one thousand, sixty-three".