51435787568863 has 4 divisors (see below), whose sum is σ = 51487690483648. Its totient is φ = 51383884654080.

The previous prime is 51435787568843. The next prime is 51435787568881. The reversal of 51435787568863 is 36886578753415.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 51435787568863 - 2⁹ = 51435787568351 is a prime.

It is a super-2 number, since 2×51435787568863² (a number of 28 digits) contains 22 as substring.

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 51435787568863.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51435787568843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25951455906 + ... + 25951457887.

It is an arithmetic number, because the mean of its divisors is an integer number (12871922620912).

Almost surely, 2^{51435787568863} is an apocalyptic number.

51435787568863 is a deficient number, since it is larger than the sum of its proper divisors (51902914785).

51435787568863 is an equidigital number, since it uses as much as digits as its factorization.

51435787568863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51902914784.

The product of its digits is 4064256000, while the sum is 76.

The spelling of 51435787568863 in words is "fifty-one trillion, four hundred thirty-five billion, seven hundred eighty-seven million, five hundred sixty-eight thousand, eight hundred sixty-three".