51910046550 has 144 divisors (see below), whose sum is σ = 149329973520. Its totient is φ = 12881848320.

The previous prime is 51910046549. The next prime is 51910046597. The reversal of 51910046550 is 5564001915.

51910046550 is a `hidden beast` number, since 5 + 191 + 0 + 0 + 465 + 5 + 0 = 666.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 642729 + ... + 718971.

It is an arithmetic number, because the mean of its divisors is an integer number (1037013705).

Almost surely, 2^51910046550 is an apocalyptic number.

51910046550 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 51910046550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74664986760).

51910046550 is an abundant number, since it is smaller than the sum of its proper divisors (97419926970).

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

51910046550 is a wasteful number, since it uses less digits than its factorization.

51910046550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76367 (or 76359 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 36.

The spelling of 51910046550 in words is "fifty-one billion, nine hundred ten million, forty-six thousand, five hundred fifty".