51365140000 has 120 divisors (see below), whose sum is σ = 130443844608. Its totient is φ = 19883040000.

The previous prime is 51365139997. The next prime is 51365140019. The reversal of 51365140000 is 4156315.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 578577 + ... + 661423.

Almost surely, 2^51365140000 is an apocalyptic number.

51365140000 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 51365140000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (65221922304).

51365140000 is an abundant number, since it is smaller than the sum of its proper divisors (79078704608).

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

51365140000 is an equidigital number, since it uses as much as digits as its factorization.

51365140000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82908 (or 82885 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 25.

Adding to 51365140000 its reverse (4156315), we get a palindrome (51369296315).

The spelling of 51365140000 in words is "fifty-one billion, three hundred sixty-five million, one hundred forty thousand".