6561116165102 has 4 divisors (see below), whose sum is σ = 9841674247656. Its totient is φ = 3280558082550.

The previous prime is 6561116165101. The next prime is 6561116165117. The reversal of 6561116165102 is 2015616111656.

It is a happy number.

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

It is a super-3 number, since 3×6561116165102³ (a number of 39 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 6561116165102.

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 pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1640279041274 + ... + 1640279041277.

It is an arithmetic number, because the mean of its divisors is an integer number (2460418561914).

Almost surely, 2^{6561116165102} is an apocalyptic number.

6561116165102 is a deficient number, since it is larger than the sum of its proper divisors (3280558082554).

6561116165102 is a wasteful number, since it uses less digits than its factorization.

6561116165102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3280558082553.

The product of its (nonzero) digits is 64800, while the sum is 41.

The spelling of 6561116165102 in words is "six trillion, five hundred sixty-one billion, one hundred sixteen million, one hundred sixty-five thousand, one hundred two".