51773381550 has 240 divisors, whose sum is σ = 157449815424. Its totient is φ = 12509640000.

The previous prime is 51773381537. The next prime is 51773381557. The reversal of 51773381550 is 5518337715.

51773381550 is a `hidden beast` number, since 5 + 17 + 7 + 3 + 3 + 81 + 550 = 666.

It is a super-3 number, since 3×51773381550³ (a number of 33 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a junction number, because it is equal to n+sod(n) for n = 51773381496 and 51773381505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51773381557) by changing a digit.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 14744295 + ... + 14747805.

Almost surely, 2^51773381550 is an apocalyptic number.

51773381550 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 51773381550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78724907712).

51773381550 is an abundant number, since it is smaller than the sum of its proper divisors (105676433874).

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

51773381550 is a wasteful number, since it uses less digits than its factorization.

51773381550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3877 (or 3863 counting only the distinct ones).

The product of its (nonzero) digits is 441000, while the sum is 45.

The spelling of 51773381550 in words is "fifty-one billion, seven hundred seventy-three million, three hundred eighty-one thousand, five hundred fifty".