6501864550 has 48 divisors (see below), whose sum is σ = 12197313072. Its totient is φ = 2578492800.

The previous prime is 6501864539. The next prime is 6501864559. The reversal of 6501864550 is 554681056.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6501864559) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6695565 + ... + 6696535.

It is an arithmetic number, because the mean of its divisors is an integer number (254110689).

Almost surely, 2^6501864550 is an apocalyptic number.

6501864550 is a deficient number, since it is larger than the sum of its proper divisors (5695448522).

6501864550 is a wasteful number, since it uses less digits than its factorization.

6501864550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1993 (or 1988 counting only the distinct ones).

The product of its (nonzero) digits is 144000, while the sum is 40.

The square root of 6501864550 is about 80634.1401020684. The cubic root of 6501864550 is about 1866.4340088787.

The spelling of 6501864550 in words is "six billion, five hundred one million, eight hundred sixty-four thousand, five hundred fifty".