515116206661 has 8 divisors (see below), whose sum is σ = 623333897280. Its totient is φ = 415555931328.

The previous prime is 515116206581. The next prime is 515116206697. The reversal of 515116206661 is 166602611515.

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

It is a cyclic number.

It is not a de Polignac number, because 515116206661 - 2⁷ = 515116206533 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (515116206961) 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, 2164353691 + ... + 2164353928.

It is an arithmetic number, because the mean of its divisors is an integer number (77916737160).

Almost surely, 2^515116206661 is an apocalyptic number.

It is an amenable number.

515116206661 is a deficient number, since it is larger than the sum of its proper divisors (108217690619).

515116206661 is a wasteful number, since it uses less digits than its factorization.

515116206661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4328707643.

The product of its (nonzero) digits is 64800, while the sum is 40.

The spelling of 515116206661 in words is "five hundred fifteen billion, one hundred sixteen million, two hundred six thousand, six hundred sixty-one".