6403686351 has 4 divisors (see below), whose sum is σ = 8538248472. Its totient is φ = 4269124232.

The previous prime is 6403686347. The next prime is 6403686379. The reversal of 6403686351 is 1536863046.

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

It is a cyclic number.

It is not a de Polignac number, because 6403686351 - 2² = 6403686347 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6403686551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1067281056 + ... + 1067281061.

It is an arithmetic number, because the mean of its divisors is an integer number (2134562118).

Almost surely, 2^6403686351 is an apocalyptic number.

6403686351 is a deficient number, since it is larger than the sum of its proper divisors (2134562121).

6403686351 is a wasteful number, since it uses less digits than its factorization.

6403686351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2134562120.

The product of its (nonzero) digits is 311040, while the sum is 42.

The square root of 6403686351 is about 80023.0363770333. The cubic root of 6403686351 is about 1856.9919343099.

The spelling of 6403686351 in words is "six billion, four hundred three million, six hundred eighty-six thousand, three hundred fifty-one".