51889862688 has 96 divisors (see below), whose sum is σ = 145191916800. Its totient is φ = 16169840640.

The previous prime is 51889862683. The next prime is 51889862711. The reversal of 51889862688 is 88626898815.

It is a tau number, because it is divible by the number of its divisors (96).

It is not an unprimeable number, because it can be changed into a prime (51889862683) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 136473 + ... + 349863.

It is an arithmetic number, because the mean of its divisors is an integer number (1512415800).

Almost surely, 2^51889862688 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51889862688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (72595958400).

51889862688 is an abundant number, since it is smaller than the sum of its proper divisors (93302054112).

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

51889862688 is a wasteful number, since it uses less digits than its factorization.

51889862688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213570 (or 213562 counting only the distinct ones).

The product of its digits is 106168320, while the sum is 69.

The spelling of 51889862688 in words is "fifty-one billion, eight hundred eighty-nine million, eight hundred sixty-two thousand, six hundred eighty-eight".