51683831782873 has 4 divisors (see below), whose sum is σ = 52185616557568. Its totient is φ = 51182047008180.

The previous prime is 51683831782867. The next prime is 51683831782897. The reversal of 51683831782873 is 37828713838615.

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 not a de Polignac number, because 51683831782873 - 2²⁵ = 51683798228441 is a prime.

It is a super-2 number, since 2×51683831782873² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51683831782073) 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, 250892387193 + ... + 250892387398.

It is an arithmetic number, because the mean of its divisors is an integer number (13046404139392).

Almost surely, 2^{51683831782873} is an apocalyptic number.

It is an amenable number.

51683831782873 is a deficient number, since it is larger than the sum of its proper divisors (501784774695).

51683831782873 is a wasteful number, since it uses less digits than its factorization.

51683831782873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 501784774694.

The product of its digits is 325140480, while the sum is 70.

The spelling of 51683831782873 in words is "fifty-one trillion, six hundred eighty-three billion, eight hundred thirty-one million, seven hundred eighty-two thousand, eight hundred seventy-three".