512155656436 has 6 divisors (see below), whose sum is σ = 896272398770. Its totient is φ = 256077828216.

The previous prime is 512155656431. The next prime is 512155656461. The reversal of 512155656436 is 634656551215.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 429732691600 + 82422964836 = 655540^2 + 287094^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 512155656436.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (512155656431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64019457051 + ... + 64019457058.

Almost surely, 2^512155656436 is an apocalyptic number.

It is an amenable number.

512155656436 is a deficient number, since it is larger than the sum of its proper divisors (384116742334).

512155656436 is a wasteful number, since it uses less digits than its factorization.

512155656436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128038914113 (or 128038914111 counting only the distinct ones).

The product of its digits is 3240000, while the sum is 49.

The spelling of 512155656436 in words is "five hundred twelve billion, one hundred fifty-five million, six hundred fifty-six thousand, four hundred thirty-six".