51838683816 has 32 divisors (see below), whose sum is σ = 129603268800. Its totient is φ = 17278686720.

The previous prime is 51838683811. The next prime is 51838683821. The reversal of 51838683816 is 61838683815.

It is an interprime number because it is at equal distance from previous prime (51838683811) and next prime (51838683821).

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

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 579621 + ... + 663051.

It is an arithmetic number, because the mean of its divisors is an integer number (4050102150).

Almost surely, 2^51838683816 is an apocalyptic number.

It is an amenable number.

51838683816 is an abundant number, since it is smaller than the sum of its proper divisors (77764584984).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51838683816 is a wasteful number, since it uses less digits than its factorization.

51838683816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109329 (or 109325 counting only the distinct ones).

The product of its digits is 6635520, while the sum is 57.

Subtracting 51838683816 from its reverse (61838683815), we obtain a palindrome (9999999999).

The spelling of 51838683816 in words is "fifty-one billion, eight hundred thirty-eight million, six hundred eighty-three thousand, eight hundred sixteen".