512661878 has 8 divisors (see below), whose sum is σ = 776920872. Its totient is φ = 253688256.

The previous prime is 512661871. The next prime is 512661887. The reversal of 512661878 is 878166215.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (512661871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1321100 + ... + 1321487.

It is an arithmetic number, because the mean of its divisors is an integer number (97115109).

Almost surely, 2^512661878 is an apocalyptic number.

512661878 is a deficient number, since it is larger than the sum of its proper divisors (264258994).

512661878 is a wasteful number, since it uses less digits than its factorization.

512661878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2642686.

The product of its digits is 161280, while the sum is 44.

The square root of 512661878 is about 22642.0378499816. The cubic root of 512661878 is about 800.3445796847.

The spelling of 512661878 in words is "five hundred twelve million, six hundred sixty-one thousand, eight hundred seventy-eight".