51355385165530 has 16 divisors (see below), whose sum is σ = 92439938523240. Its totient is φ = 20542099571712.

The previous prime is 51355385165527. The next prime is 51355385165549. The reversal of 51355385165530 is 3556158355315.

It can be written as a sum of positive squares in 4 ways, for example, as 24039281522169 + 27316103643361 = 4902987^2 + 5226481^2 .

It is a super-3 number, since 3×51355385165530³ (a number of 42 digits) contains 333 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2737719 + ... + 10497898.

Almost surely, 2^{51355385165530} is an apocalyptic number.

51355385165530 is a deficient number, since it is larger than the sum of its proper divisors (41084553357710).

51355385165530 is a wasteful number, since it uses less digits than its factorization.

51355385165530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13623633.

The product of its (nonzero) digits is 20250000, while the sum is 55.

The spelling of 51355385165530 in words is "fifty-one trillion, three hundred fifty-five billion, three hundred eighty-five million, one hundred sixty-five thousand, five hundred thirty".