515550352132123 has 16 divisors (see below), whose sum is σ = 651569062726656. Its totient is φ = 396224430027840.

The previous prime is 515550352132117. The next prime is 515550352132139. The reversal of 515550352132123 is 321231253055515.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 515550352132123 - 2⁹ = 515550352131611 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 515550352132123.

It is not an unprimeable number, because it can be changed into a prime (515550352133123) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45859303411 + ... + 45859314652.

It is an arithmetic number, because the mean of its divisors is an integer number (40723066420416).

Almost surely, 2^{515550352132123} is an apocalyptic number.

515550352132123 is a deficient number, since it is larger than the sum of its proper divisors (136018710594533).

515550352132123 is a wasteful number, since it uses less digits than its factorization.

515550352132123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91718618154.

The product of its (nonzero) digits is 675000, while the sum is 43.

The spelling of 515550352132123 in words is "five hundred fifteen trillion, five hundred fifty billion, three hundred fifty-two million, one hundred thirty-two thousand, one hundred twenty-three".