515661161099 has 8 divisors (see below), whose sum is σ = 589347725280. Its totient is φ = 441979767936.

The previous prime is 515661161089. The next prime is 515661161107. The reversal of 515661161099 is 990161166515.

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

It is not a de Polignac number, because 515661161099 - 2²⁰ = 515660112523 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (515661161089) 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, 1076654 + ... + 1480035.

It is an arithmetic number, because the mean of its divisors is an integer number (73668465660).

Almost surely, 2^515661161099 is an apocalyptic number.

515661161099 is a deficient number, since it is larger than the sum of its proper divisors (73686564181).

515661161099 is a wasteful number, since it uses less digits than its factorization.

515661161099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2585509.

The product of its (nonzero) digits is 437400, while the sum is 50.

The spelling of 515661161099 in words is "five hundred fifteen billion, six hundred sixty-one million, one hundred sixty-one thousand, ninety-nine".