51872061920 has 384 divisors, whose sum is σ = 159774031872. Its totient is φ = 15490252800.

The previous prime is 51872061911. The next prime is 51872061959. The reversal of 51872061920 is 2916027815.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 13573610 + ... + 13577430.

It is an arithmetic number, because the mean of its divisors is an integer number (416078208).

Almost surely, 2^51872061920 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 51872061920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (79887015936).

51872061920 is an abundant number, since it is smaller than the sum of its proper divisors (107901969952).

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

51872061920 is a wasteful number, since it uses less digits than its factorization.

51872061920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3914 (or 3906 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 41.

The spelling of 51872061920 in words is "fifty-one billion, eight hundred seventy-two million, sixty-one thousand, nine hundred twenty".