51525720000 has 1120 divisors, whose sum is σ = 208213350400. Its totient is φ = 12597120000.

The previous prime is 51525719989. The next prime is 51525720007. The reversal of 51525720000 is 2752515.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51525720007) by changing a digit.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 1662119985 + ... + 1662120015.

Almost surely, 2^51525720000 is an apocalyptic number.

51525720000 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51525720000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (104106675200).

51525720000 is an abundant number, since it is smaller than the sum of its proper divisors (156687630400).

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

51525720000 is an frugal number, since it uses more digits than its factorization.

51525720000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103 (or 60 counting only the distinct ones).

The product of its (nonzero) digits is 3500, while the sum is 27.

The spelling of 51525720000 in words is "fifty-one billion, five hundred twenty-five million, seven hundred twenty thousand".