51505045163553 has 32 divisors (see below), whose sum is σ = 69671448000000. Its totient is φ = 33839321548032.

The previous prime is 51505045163519. The next prime is 51505045163581. The reversal of 51505045163553 is 35536154050515.

It is not a de Polignac number, because 51505045163553 - 2³⁶ = 51436325686817 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51505045163653) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 387921823 + ... + 388054571.

It is an arithmetic number, because the mean of its divisors is an integer number (2177232750000).

Almost surely, 2^{51505045163553} is an apocalyptic number.

It is an amenable number.

51505045163553 is a deficient number, since it is larger than the sum of its proper divisors (18166402836447).

51505045163553 is a wasteful number, since it uses less digits than its factorization.

51505045163553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135849.

The product of its (nonzero) digits is 3375000, while the sum is 48.

The spelling of 51505045163553 in words is "fifty-one trillion, five hundred five billion, forty-five million, one hundred sixty-three thousand, five hundred fifty-three".