6561116165103 has 8 divisors (see below), whose sum is σ = 8749950873216. Its totient is φ = 4373179450200.

The previous prime is 6561116165101. The next prime is 6561116165117. The reversal of 6561116165103 is 3015616111656.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 6561116165103 - 2¹ = 6561116165101 is a prime.

It is a super-3 number, since 3×6561116165103³ (a number of 39 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6561116165101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 224481253 + ... + 224510478.

It is an arithmetic number, because the mean of its divisors is an integer number (1093743859152).

Almost surely, 2^{6561116165103} is an apocalyptic number.

6561116165103 is a deficient number, since it is larger than the sum of its proper divisors (2188834708113).

6561116165103 is a wasteful number, since it uses less digits than its factorization.

6561116165103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 448996605.

The product of its (nonzero) digits is 97200, while the sum is 42.

The spelling of 6561116165103 in words is "six trillion, five hundred sixty-one billion, one hundred sixteen million, one hundred sixty-five thousand, one hundred three".