51144450000 has 480 divisors, whose sum is σ = 191815723008. Its totient is φ = 11499840000.

The previous prime is 51144449971. The next prime is 51144450011. The reversal of 51144450000 is 5444115.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 70349637 + ... + 70350363.

Almost surely, 2^51144450000 is an apocalyptic number.

51144450000 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 51144450000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (95907861504).

51144450000 is an abundant number, since it is smaller than the sum of its proper divisors (140671273008).

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

51144450000 is an equidigital number, since it uses as much as digits as its factorization.

51144450000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 837 (or 811 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 24.

Adding to 51144450000 its reverse (5444115), we get a palindrome (51149894115).

The spelling of 51144450000 in words is "fifty-one billion, one hundred forty-four million, four hundred fifty thousand".