515413661 has 16 divisors (see below), whose sum is σ = 595926144. Its totient is φ = 436653504.

The previous prime is 515413651. The next prime is 515413669. The reversal of 515413661 is 166314515.

It is not a de Polignac number, because 515413661 - 2¹⁰ = 515412637 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (515413669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 223631 + ... + 225923.

It is an arithmetic number, because the mean of its divisors is an integer number (37245384).

Almost surely, 2^515413661 is an apocalyptic number.

It is an amenable number.

515413661 is a deficient number, since it is larger than the sum of its proper divisors (80512483).

515413661 is a wasteful number, since it uses less digits than its factorization.

515413661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2660.

The product of its digits is 10800, while the sum is 32.

The square root of 515413661 is about 22702.7236471750. The cubic root of 515413661 is about 801.7740116331.

The spelling of 515413661 in words is "five hundred fifteen million, four hundred thirteen thousand, six hundred sixty-one".