51056551505 has 8 divisors (see below), whose sum is σ = 61658103912. Its totient is φ = 40585079808.

The previous prime is 51056551501. The next prime is 51056551573. The reversal of 51056551505 is 50515565015.

It is a happy number.

51056551505 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 15661020736 + 35395530769 = 125144^2 + 188137^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 51056551505 - 2² = 51056551501 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51056551501) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32519312 + ... + 32520881.

It is an arithmetic number, because the mean of its divisors is an integer number (7707262989).

Almost surely, 2^51056551505 is an apocalyptic number.

It is an amenable number.

51056551505 is a deficient number, since it is larger than the sum of its proper divisors (10601552407).

51056551505 is a wasteful number, since it uses less digits than its factorization.

51056551505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65040355.

The product of its (nonzero) digits is 93750, while the sum is 38.

The spelling of 51056551505 in words is "fifty-one billion, fifty-six million, five hundred fifty-one thousand, five hundred five".