6551565101 has 4 divisors (see below), whose sum is σ = 6564140604. Its totient is φ = 6538989600.

The previous prime is 6551565089. The next prime is 6551565133. The reversal of 6551565101 is 1015651556.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1689292201 + 4862272900 = 41101^2 + 69730^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6551565101 is a prime.

It is a super-2 number, since 2×6551565101² = 85846010545282280402, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6551565301) 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, 6286970 + ... + 6288011.

It is an arithmetic number, because the mean of its divisors is an integer number (1641035151).

Almost surely, 2^6551565101 is an apocalyptic number.

It is an amenable number.

6551565101 is a deficient number, since it is larger than the sum of its proper divisors (12575503).

6551565101 is a wasteful number, since it uses less digits than its factorization.

6551565101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12575502.

The product of its (nonzero) digits is 22500, while the sum is 35.

The square root of 6551565101 is about 80941.7389299242. The cubic root of 6551565101 is about 1871.1776448809.

The spelling of 6551565101 in words is "six billion, five hundred fifty-one million, five hundred sixty-five thousand, one hundred one".