51044819616 has 144 divisors (see below), whose sum is σ = 175654350144. Its totient is φ = 13726328832.

The previous prime is 51044819543. The next prime is 51044819621. The reversal of 51044819616 is 61691844015.

51044819616 is a `hidden beast` number, since 5 + 1 + 0 + 448 + 196 + 16 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 710430 + ... + 778973.

It is an arithmetic number, because the mean of its divisors is an integer number (1219821876).

Almost surely, 2^51044819616 is an apocalyptic number.

51044819616 is a gapful number since it is divisible by the number (56) formed by its first and last digit.

It is an amenable number.

51044819616 is an abundant number, since it is smaller than the sum of its proper divisors (124609530528).

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

51044819616 is a wasteful number, since it uses less digits than its factorization.

51044819616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1489443 (or 1489432 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 45.

The spelling of 51044819616 in words is "fifty-one billion, forty-four million, eight hundred nineteen thousand, six hundred sixteen".