51550166665080 has 224 divisors, whose sum is σ = 175069403784000. Its totient is φ = 13654450153728.

The previous prime is 51550166665031. The next prime is 51550166665097. The reversal of 51550166665080 is 8056666105515.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 1587504 + ... + 10277183.

Almost surely, 2^{51550166665080} 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 51550166665080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (87534701892000).

51550166665080 is an abundant number, since it is smaller than the sum of its proper divisors (123519237118920).

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

51550166665080 is a wasteful number, since it uses less digits than its factorization.

51550166665080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11864865 (or 11864846 counting only the distinct ones).

The product of its (nonzero) digits is 6480000, while the sum is 54.

The spelling of 51550166665080 in words is "fifty-one trillion, five hundred fifty billion, one hundred sixty-six million, six hundred sixty-five thousand, eighty".