51768398811 has 8 divisors (see below), whose sum is σ = 72657401920. Its totient is φ = 32695830792.

The previous prime is 51768398809. The next prime is 51768398813. The reversal of 51768398811 is 11889386715.

51768398811 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (51768398809) and next prime (51768398813).

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

It is not a de Polignac number, because 51768398811 - 2¹ = 51768398809 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (57), and also a Moran number because the ratio is a prime number: 908217523 = 51768398811 / (5 + 1 + 7 + 6 + 8 + 3 + 9 + 8 + 8 + 1 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51768398813) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 454108705 + ... + 454108818.

It is an arithmetic number, because the mean of its divisors is an integer number (9082175240).

Almost surely, 2^51768398811 is an apocalyptic number.

51768398811 is a deficient number, since it is larger than the sum of its proper divisors (20889003109).

51768398811 is a wasteful number, since it uses less digits than its factorization.

51768398811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 908217545.

The product of its digits is 2903040, while the sum is 57.

The spelling of 51768398811 in words is "fifty-one billion, seven hundred sixty-eight million, three hundred ninety-eight thousand, eight hundred eleven".