512540878225 has 12 divisors (see below), whose sum is σ = 672936024204. Its totient is φ = 385913131520.

The previous prime is 512540878183. The next prime is 512540878229. The reversal of 512540878225 is 522878045215.

It can be written as a sum of positive squares in 6 ways, for example, as 3093250689 + 509447627536 = 55617^2 + 713756^2 .

It is a de Polignac number, because none of the positive numbers 2^k-512540878225 is a prime.

It is not an unprimeable number, because it can be changed into a prime (512540878229) 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, 602988844 + ... + 602989693.

It is an arithmetic number, because the mean of its divisors is an integer number (56078002017).

Almost surely, 2^512540878225 is an apocalyptic number.

It is an amenable number.

512540878225 is a deficient number, since it is larger than the sum of its proper divisors (160395145979).

512540878225 is a wasteful number, since it uses less digits than its factorization.

512540878225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1205978564 (or 1205978559 counting only the distinct ones).

The product of its (nonzero) digits is 1792000, while the sum is 49.

The spelling of 512540878225 in words is "five hundred twelve billion, five hundred forty million, eight hundred seventy-eight thousand, two hundred twenty-five".