515145645 has 48 divisors (see below), whose sum is σ = 1080518400. Its totient is φ = 221640192.

The previous prime is 515145641. The next prime is 515145661. The reversal of 515145645 is 546541515.

515145645 is a `hidden beast` number, since 5 + 1 + 5 + 1 + 4 + 5 + 645 = 666.

It is not a de Polignac number, because 515145645 - 2² = 515145641 is a prime.

It is a super-3 number, since 3×515145645³ (a number of 27 digits) contains 333 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (515145641) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 42745 + ... + 53454.

It is an arithmetic number, because the mean of its divisors is an integer number (22510800).

Almost surely, 2^515145645 is an apocalyptic number.

It is an amenable number.

515145645 is an abundant number, since it is smaller than the sum of its proper divisors (565372755).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

515145645 is a wasteful number, since it uses less digits than its factorization.

515145645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96234 (or 96231 counting only the distinct ones).

The product of its digits is 60000, while the sum is 36.

The square root of 515145645 is about 22696.8201517305. The cubic root of 515145645 is about 801.6350129103.

The spelling of 515145645 in words is "five hundred fifteen million, one hundred forty-five thousand, six hundred forty-five".