51838683815 has 4 divisors (see below), whose sum is σ = 62206420584. Its totient is φ = 41470947048.

The previous prime is 51838683811. The next prime is 51838683821.

It is a happy number.

51838683815 is nontrivially palindromic in base 10.

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 51838683815 - 2² = 51838683811 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51838683811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5183868377 + ... + 5183868386.

It is an arithmetic number, because the mean of its divisors is an integer number (15551605146).

Almost surely, 2^51838683815 is an apocalyptic number.

51838683815 is a deficient number, since it is larger than the sum of its proper divisors (10367736769).

51838683815 is a wasteful number, since it uses less digits than its factorization.

51838683815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10367736768.

The product of its digits is 5529600, while the sum is 56.

The spelling of 51838683815 in words is "fifty-one billion, eight hundred thirty-eight million, six hundred eighty-three thousand, eight hundred fifteen".