51284694209359 has 4 divisors (see below), whose sum is σ = 55229670687016. Its totient is φ = 47339717731704.

The previous prime is 51284694209351. The next prime is 51284694209459. The reversal of 51284694209359 is 95390249648215.

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 51284694209359 - 2³ = 51284694209351 is a prime.

It is a super-2 number, since 2×51284694209359² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51284694209294 and 51284694209303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51284694209351) 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, 1972488238809 + ... + 1972488238834.

It is an arithmetic number, because the mean of its divisors is an integer number (13807417671754).

Almost surely, 2^{51284694209359} is an apocalyptic number.

51284694209359 is a deficient number, since it is larger than the sum of its proper divisors (3944976477657).

51284694209359 is a wasteful number, since it uses less digits than its factorization.

51284694209359 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3944976477656.

The product of its (nonzero) digits is 167961600, while the sum is 67.

The spelling of 51284694209359 in words is "fifty-one trillion, two hundred eighty-four billion, six hundred ninety-four million, two hundred nine thousand, three hundred fifty-nine".