6863649252 has 12 divisors (see below), whose sum is σ = 16015181616. Its totient is φ = 2287883080.

The previous prime is 6863649217. The next prime is 6863649257. The reversal of 6863649252 is 2529463686.

It is a tau number, because it is divible by the number of its divisors (12).

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 6863649195 and 6863649204.

It is not an unprimeable number, because it can be changed into a prime (6863649257) 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, 285985374 + ... + 285985397.

It is an arithmetic number, because the mean of its divisors is an integer number (1334598468).

Almost surely, 2^6863649252 is an apocalyptic number.

It is an amenable number.

6863649252 is an abundant number, since it is smaller than the sum of its proper divisors (9151532364).

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

6863649252 is a wasteful number, since it uses less digits than its factorization.

6863649252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 571970778 (or 571970776 counting only the distinct ones).

The product of its digits is 3732480, while the sum is 51.

The square root of 6863649252 is about 82847.1438976625. The cubic root of 6863649252 is about 1900.4291968536.

The spelling of 6863649252 in words is "six billion, eight hundred sixty-three million, six hundred forty-nine thousand, two hundred fifty-two".