516172845 has 16 divisors (see below), whose sum is σ = 831908160. Its totient is φ = 273281664.

The previous prime is 516172843. The next prime is 516172849. The reversal of 516172845 is 548271615.

It is not a de Polignac number, because 516172845 - 2¹ = 516172843 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (516172843) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 123535 + ... + 127644.

It is an arithmetic number, because the mean of its divisors is an integer number (51994260).

Almost surely, 2^516172845 is an apocalyptic number.

It is an amenable number.

516172845 is a deficient number, since it is larger than the sum of its proper divisors (315735315).

516172845 is a wasteful number, since it uses less digits than its factorization.

516172845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 251324.

The product of its digits is 67200, while the sum is 39.

The square root of 516172845 is about 22719.4376030746. The cubic root of 516172845 is about 802.1674790107.

The spelling of 516172845 in words is "five hundred sixteen million, one hundred seventy-two thousand, eight hundred forty-five".