6403399616 has 14 divisors (see below), whose sum is σ = 12706746240. Its totient is φ = 3201699776.

The previous prime is 6403399573. The next prime is 6403399621. The reversal of 6403399616 is 6169933046.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50026496 + ... + 50026623.

Almost surely, 2^6403399616 is an apocalyptic number.

It is an amenable number.

6403399616 is a deficient number, since it is larger than the sum of its proper divisors (6303346624).

6403399616 is a wasteful number, since it uses less digits than its factorization.

6403399616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100053131 (or 100053121 counting only the distinct ones).

The product of its (nonzero) digits is 629856, while the sum is 47.

The square root of 6403399616 is about 80021.2447791210. The cubic root of 6403399616 is about 1856.9642173305.

The spelling of 6403399616 in words is "six billion, four hundred three million, three hundred ninety-nine thousand, six hundred sixteen".