51004043005440 has 320 divisors, whose sum is σ = 186838669416960. Its totient is φ = 11627302256640.

The previous prime is 51004043005417. The next prime is 51004043005459. The reversal of 51004043005440 is 4450034040015.

It is a tau number, because it is divible by the number of its divisors (320).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 51004043005398 and 51004043005407.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19123410 + ... + 21626670.

It is an arithmetic number, because the mean of its divisors is an integer number (583870841928).

Almost surely, 2^{51004043005440} 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 51004043005440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (93419334708480).

51004043005440 is an abundant number, since it is smaller than the sum of its proper divisors (135834626411520).

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

51004043005440 is a wasteful number, since it uses less digits than its factorization.

51004043005440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2503673 (or 2503657 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 30.

Adding to 51004043005440 its reverse (4450034040015), we get a palindrome (55454077045455).

The spelling of 51004043005440 in words is "fifty-one trillion, four billion, forty-three million, five thousand, four hundred forty".