51505555722 has 8 divisors (see below), whose sum is σ = 103011111456. Its totient is φ = 17168518572.

The previous prime is 51505555681. The next prime is 51505555733. The reversal of 51505555722 is 22755550515.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

51505555722 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4292129638 + ... + 4292129649.

It is an arithmetic number, because the mean of its divisors is an integer number (12876388932).

Almost surely, 2^51505555722 is an apocalyptic number.

51505555722 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

51505555722 is a wasteful number, since it uses less digits than its factorization.

51505555722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8584259292.

The product of its (nonzero) digits is 437500, while the sum is 42.

The spelling of 51505555722 in words is "fifty-one billion, five hundred five million, five hundred fifty-five thousand, seven hundred twenty-two".