515642550165 has 48 divisors (see below), whose sum is σ = 915690537216. Its totient is φ = 268269408000.

The previous prime is 515642550161. The next prime is 515642550167. The reversal of 515642550165 is 561055246515.

It is a happy number.

515642550165 is a `hidden beast` number, since 5 + 1 + 5 + 64 + 25 + 501 + 65 = 666.

515642550165 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 515642550165 - 2² = 515642550161 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 515642550165.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (515642550161) 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, 26836992 + ... + 26856198.

It is an arithmetic number, because the mean of its divisors is an integer number (19076886192).

Almost surely, 2^515642550165 is an apocalyptic number.

It is an amenable number.

515642550165 is a deficient number, since it is larger than the sum of its proper divisors (400047987051).

515642550165 is a wasteful number, since it uses less digits than its factorization.

515642550165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33810 (or 33807 counting only the distinct ones).

The product of its (nonzero) digits is 900000, while the sum is 45.

The spelling of 515642550165 in words is "five hundred fifteen billion, six hundred forty-two million, five hundred fifty thousand, one hundred sixty-five".