6565012155 has 24 divisors (see below), whose sum is σ = 12254690448. Its totient is φ = 3232005696.

The previous prime is 6565012147. The next prime is 6565012169. The reversal of 6565012155 is 5512105656.

It is not a de Polignac number, because 6565012155 - 2³ = 6565012147 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5610537 + ... + 5611706.

It is an arithmetic number, because the mean of its divisors is an integer number (510612102).

Almost surely, 2^6565012155 is an apocalyptic number.

6565012155 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

6565012155 is a deficient number, since it is larger than the sum of its proper divisors (5689678293).

6565012155 is a wasteful number, since it uses less digits than its factorization.

6565012155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11222267 (or 11222264 counting only the distinct ones).

The product of its (nonzero) digits is 45000, while the sum is 36.

The square root of 6565012155 is about 81024.7626037868. The cubic root of 6565012155 is about 1872.4569642094.

The spelling of 6565012155 in words is "six billion, five hundred sixty-five million, twelve thousand, one hundred fifty-five".