515645145 has 12 divisors (see below), whose sum is σ = 893784996. Its totient is φ = 275010720.

The previous prime is 515645111. The next prime is 515645149. The reversal of 515645145 is 541546515.

515645145 is a `hidden beast` number, since 5 + 1 + 5 + 645 + 1 + 4 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 314459289 + 201185856 = 17733^2 + 14184^2 .

It is not a de Polignac number, because 515645145 - 2¹⁶ = 515579609 is a prime.

It is not an unprimeable number, because it can be changed into a prime (515645149) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5729346 + ... + 5729435.

It is an arithmetic number, because the mean of its divisors is an integer number (74482083).

Almost surely, 2^515645145 is an apocalyptic number.

It is an amenable number.

515645145 is a deficient number, since it is larger than the sum of its proper divisors (378139851).

515645145 is a wasteful number, since it uses less digits than its factorization.

515645145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11458792 (or 11458789 counting only the distinct ones).

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

The square root of 515645145 is about 22707.8212296997. The cubic root of 515645145 is about 801.8940253172.

The spelling of 515645145 in words is "five hundred fifteen million, six hundred forty-five thousand, one hundred forty-five".