515061561161 has 32 divisors (see below), whose sum is σ = 622207676160. Its totient is φ = 416504457216.

The previous prime is 515061561103. The next prime is 515061561191. The reversal of 515061561161 is 161165160515.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-515061561161 is a prime.

It is not an unprimeable number, because it can be changed into a prime (515061561191) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 32069045 + ... + 32085101.

It is an arithmetic number, because the mean of its divisors is an integer number (19443989880).

Almost surely, 2^515061561161 is an apocalyptic number.

It is an amenable number.

515061561161 is a deficient number, since it is larger than the sum of its proper divisors (107146114999).

515061561161 is a wasteful number, since it uses less digits than its factorization.

515061561161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17073.

The product of its (nonzero) digits is 27000, while the sum is 38.

The spelling of 515061561161 in words is "five hundred fifteen billion, sixty-one million, five hundred sixty-one thousand, one hundred sixty-one".