6449962647 has 4 divisors (see below), whose sum is σ = 8599950200. Its totient is φ = 4299975096.

The previous prime is 6449962643. The next prime is 6449962763. The reversal of 6449962647 is 7462699446.

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

It is not a de Polignac number, because 6449962647 - 2² = 6449962643 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 (6449962643) 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, 1074993772 + ... + 1074993777.

It is an arithmetic number, because the mean of its divisors is an integer number (2149987550).

Almost surely, 2^6449962647 is an apocalyptic number.

6449962647 is a deficient number, since it is larger than the sum of its proper divisors (2149987553).

6449962647 is a wasteful number, since it uses less digits than its factorization.

6449962647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2149987552.

The product of its digits is 15676416, while the sum is 57.

The square root of 6449962647 is about 80311.6594710880. The cubic root of 6449962647 is about 1861.4543917215.

The spelling of 6449962647 in words is "six billion, four hundred forty-nine million, nine hundred sixty-two thousand, six hundred forty-seven".