15661316552343 has 128 divisors (see below), whose sum is σ = 27630133641216. Its totient is φ = 7652301465600.

The previous prime is 15661316552333. The next prime is 15661316552369. The reversal of 15661316552343 is 34325561316651.

It is not a de Polignac number, because 15661316552343 - 2¹⁰ = 15661316551319 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15661316552333) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 250883071 + ... + 250945487.

It is an arithmetic number, because the mean of its divisors is an integer number (215860419072).

Almost surely, 2^{15661316552343} is an apocalyptic number.

15661316552343 is a deficient number, since it is larger than the sum of its proper divisors (11968817088873).

15661316552343 is a wasteful number, since it uses less digits than its factorization.

15661316552343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63453.

The product of its digits is 5832000, while the sum is 51.

Adding to 15661316552343 its reverse (34325561316651), we get a palindrome (49986877868994).

The spelling of 15661316552343 in words is "fifteen trillion, six hundred sixty-one billion, three hundred sixteen million, five hundred fifty-two thousand, three hundred forty-three".