51873917952 has 176 divisors, whose sum is σ = 150239974400. Its totient is φ = 15852257280.

The previous prime is 51873917947. The next prime is 51873917959. The reversal of 51873917952 is 25971937815.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a junction number, because it is equal to n+sod(n) for n = 51873917892 and 51873917901.

It is not an unprimeable number, because it can be changed into a prime (51873917959) 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, 1795074 + ... + 1823742.

Almost surely, 2^51873917952 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 51873917952, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (75119987200).

51873917952 is an abundant number, since it is smaller than the sum of its proper divisors (98366056448).

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

51873917952 is a wasteful number, since it uses less digits than its factorization.

51873917952 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28742 (or 28724 counting only the distinct ones).

The product of its digits is 4762800, while the sum is 57.

The spelling of 51873917952 in words is "fifty-one billion, eight hundred seventy-three million, nine hundred seventeen thousand, nine hundred fifty-two".