6449861560 has 32 divisors (see below), whose sum is σ = 14647826160. Its totient is φ = 2555831296.

The previous prime is 6449861531. The next prime is 6449861563. The reversal of 6449861560 is 651689446.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6449861563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 749209 + ... + 757768.

Almost surely, 2^6449861560 is an apocalyptic number.

It is an amenable number.

6449861560 is an abundant number, since it is smaller than the sum of its proper divisors (8197964600).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6449861560 is a wasteful number, since it uses less digits than its factorization.

6449861560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1507095 (or 1507091 counting only the distinct ones).

The product of its (nonzero) digits is 1244160, while the sum is 49.

The square root of 6449861560 is about 80311.0301266271. The cubic root of 6449861560 is about 1861.4446671265. Note that the first 3 decimals are identical.

The spelling of 6449861560 in words is "six billion, four hundred forty-nine million, eight hundred sixty-one thousand, five hundred sixty".