512781878187216 has 120 divisors (see below), whose sum is σ = 1565862697301760. Its totient is φ = 155356280755200.

The previous prime is 512781878187169. The next prime is 512781878187259. The reversal of 512781878187216 is 612781878187215.

512781878187216 is a `hidden beast` number, since 5 + 1 + 278 + 187 + 81 + 87 + 21 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 25852761 + ... + 41157368.

It is an arithmetic number, because the mean of its divisors is an integer number (13048855810848).

Almost surely, 2^{512781878187216} is an apocalyptic number.

It is an amenable number.

512781878187216 is an abundant number, since it is smaller than the sum of its proper divisors (1053080819114544).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

512781878187216 is a wasteful number, since it uses less digits than its factorization.

512781878187216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67014985 (or 67014976 counting only the distinct ones).

The product of its digits is 168591360, while the sum is 72.

Subtracting 512781878187216 from its reverse (612781878187215), we obtain a palindrome (99999999999999).

The spelling of 512781878187216 in words is "five hundred twelve trillion, seven hundred eighty-one billion, eight hundred seventy-eight million, one hundred eighty-seven thousand, two hundred sixteen".