51717205550 has 48 divisors (see below), whose sum is σ = 96908273664. Its totient is φ = 20533500000.

The previous prime is 51717205549. The next prime is 51717205559. The reversal of 51717205550 is 5550271715.

51717205550 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51717205559) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14728295 + ... + 14731805.

It is an arithmetic number, because the mean of its divisors is an integer number (2018922368).

Almost surely, 2^51717205550 is an apocalyptic number.

51717205550 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

51717205550 is a deficient number, since it is larger than the sum of its proper divisors (45191068114).

51717205550 is a wasteful number, since it uses less digits than its factorization.

51717205550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5625 (or 5620 counting only the distinct ones).

The product of its (nonzero) digits is 61250, while the sum is 38.

The spelling of 51717205550 in words is "fifty-one billion, seven hundred seventeen million, two hundred five thousand, five hundred fifty".