51771881591824 has 15 divisors (see below), whose sum is σ = 100308076347517. Its totient is φ = 25885926405376.

The previous prime is 51771881591809. The next prime is 51771881591831. The reversal of 51771881591824 is 42819518817715.

The square root of 51771881591824 is 7195268.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 9011163459600 + 42760718132224 = 3001860^2 + 6539168^2 .

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51771881591824.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 27881664 + ... + 29680480.

Almost surely, 2^{51771881591824} is an apocalyptic number.

51771881591824 is the 7195268-th square number.

It is an amenable number.

51771881591824 is a deficient number, since it is larger than the sum of its proper divisors (48536194755693).

51771881591824 is an frugal number, since it uses more digits than its factorization.

51771881591824 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3597642 (or 1798819 counting only the distinct ones).

The product of its digits is 45158400, while the sum is 67.

The spelling of 51771881591824 in words is "fifty-one trillion, seven hundred seventy-one billion, eight hundred eighty-one million, five hundred ninety-one thousand, eight hundred twenty-four".