51000555560 has 32 divisors (see below), whose sum is σ = 121501325160. Its totient is φ = 19200208896.

The previous prime is 51000555547. The next prime is 51000555581. The reversal of 51000555560 is 6555500015.

It can be written as a sum of positive squares in 4 ways, for example, as 46511823556 + 4488732004 = 215666^2 + 66998^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37499729 + ... + 37501088.

Almost surely, 2^51000555560 is an apocalyptic number.

It is an amenable number.

51000555560 is an abundant number, since it is smaller than the sum of its proper divisors (70500769600).

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

51000555560 is a wasteful number, since it uses less digits than its factorization.

51000555560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75000845 (or 75000841 counting only the distinct ones).

The product of its (nonzero) digits is 18750, while the sum is 32.

It can be divided in two parts, 510005 and 55560, that added together give a palindrome (565565).

The spelling of 51000555560 in words is "fifty-one billion, five hundred fifty-five thousand, five hundred sixty".