51863818048 has 56 divisors (see below), whose sum is σ = 118517724864. Its totient is φ = 22057651200.

The previous prime is 51863818043. The next prime is 51863818057. The reversal of 51863818048 is 84081836815.

It is a tau number, because it is divible by the number of its divisors (56).

It is a junction number, because it is equal to n+sod(n) for n = 51863817986 and 51863818004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51863818043) 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, 383173 + ... + 500548.

It is an arithmetic number, because the mean of its divisors is an integer number (2116387944).

Almost surely, 2^51863818048 is an apocalyptic number.

It is an amenable number.

51863818048 is an abundant number, since it is smaller than the sum of its proper divisors (66653906816).

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

51863818048 is a wasteful number, since it uses less digits than its factorization.

51863818048 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 883871 (or 883861 counting only the distinct ones).

The product of its (nonzero) digits is 1474560, while the sum is 52.

The spelling of 51863818048 in words is "fifty-one billion, eight hundred sixty-three million, eight hundred eighteen thousand, forty-eight".