51746286881 has 4 divisors (see below), whose sum is σ = 51756050112. Its totient is φ = 51736523652.

The previous prime is 51746286871. The next prime is 51746286899. The reversal of 51746286881 is 18868264715.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51746286881 is a prime.

It is a super-2 number, since 2×51746286881² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51746286871) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4873661 + ... + 4884266.

It is an arithmetic number, because the mean of its divisors is an integer number (12939012528).

Almost surely, 2^51746286881 is an apocalyptic number.

It is an amenable number.

51746286881 is a deficient number, since it is larger than the sum of its proper divisors (9763231).

51746286881 is an equidigital number, since it uses as much as digits as its factorization.

51746286881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9763230.

The product of its digits is 5160960, while the sum is 56.

The spelling of 51746286881 in words is "fifty-one billion, seven hundred forty-six million, two hundred eighty-six thousand, eight hundred eighty-one".