51550100064 has 72 divisors (see below), whose sum is σ = 147253159872. Its totient is φ = 17106289920.

The previous prime is 51550100051. The next prime is 51550100081. The reversal of 51550100064 is 46000105515.

It is a happy number.

51550100064 is a `hidden beast` number, since 5 + 1 + 550 + 100 + 0 + 6 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 337107 + ... + 465554.

It is an arithmetic number, because the mean of its divisors is an integer number (2045182776).

Almost surely, 2^51550100064 is an apocalyptic number.

It is an amenable number.

51550100064 is an abundant number, since it is smaller than the sum of its proper divisors (95703059808).

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

51550100064 is a wasteful number, since it uses less digits than its factorization.

51550100064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 802900 (or 802889 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 27.

Adding to 51550100064 its reverse (46000105515), we get a palindrome (97550205579).

The spelling of 51550100064 in words is "fifty-one billion, five hundred fifty million, one hundred thousand, sixty-four".