51817370544128 has 192 divisors, whose sum is σ = 122540551660800. Its totient is φ = 21433508167680.

The previous prime is 51817370544109. The next prime is 51817370544193. The reversal of 51817370544128 is 82144507371815.

It is a Harshad number since it is a multiple of its sum of digits (56).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1160319176 + ... + 1160363832.

It is an arithmetic number, because the mean of its divisors is an integer number (638232039900).

Almost surely, 2^{51817370544128} is an apocalyptic number.

51817370544128 is a gapful number since it is divisible by the number (58) 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 51817370544128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (61270275830400).

51817370544128 is an abundant number, since it is smaller than the sum of its proper divisors (70723181116672).

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

51817370544128 is a wasteful number, since it uses less digits than its factorization.

51817370544128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47506 (or 47486 counting only the distinct ones).

The product of its (nonzero) digits is 7526400, while the sum is 56.

The spelling of 51817370544128 in words is "fifty-one trillion, eight hundred seventeen billion, three hundred seventy million, five hundred forty-four thousand, one hundred twenty-eight".