6403779463 has 4 divisors (see below), whose sum is σ = 6559969248. Its totient is φ = 6247589680.

The previous prime is 6403779443. The next prime is 6403779491. The reversal of 6403779463 is 3649773046.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6403779463 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6403779443) 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, 78094831 + ... + 78094912.

It is an arithmetic number, because the mean of its divisors is an integer number (1639992312).

Almost surely, 2^6403779463 is an apocalyptic number.

6403779463 is a deficient number, since it is larger than the sum of its proper divisors (156189785).

6403779463 is a wasteful number, since it uses less digits than its factorization.

6403779463 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156189784.

The product of its (nonzero) digits is 2286144, while the sum is 49.

The square root of 6403779463 is about 80023.6181573915. The cubic root of 6403779463 is about 1857.0009347193. Note that the first 3 decimals are identical.

The spelling of 6403779463 in words is "six billion, four hundred three million, seven hundred seventy-nine thousand, four hundred sixty-three".