51505601165 has 16 divisors (see below), whose sum is σ = 66270804480. Its totient is φ = 38289788160.

The previous prime is 51505601099. The next prime is 51505601167. The reversal of 51505601165 is 56110650515.

It is not a de Polignac number, because 51505601165 - 2¹⁶ = 51505535629 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51505601167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3828401 + ... + 3841830.

It is an arithmetic number, because the mean of its divisors is an integer number (4141925280).

Almost surely, 2^51505601165 is an apocalyptic number.

It is an amenable number.

51505601165 is a deficient number, since it is larger than the sum of its proper divisors (14765203315).

51505601165 is a wasteful number, since it uses less digits than its factorization.

51505601165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7670332.

The product of its (nonzero) digits is 22500, while the sum is 35.

The spelling of 51505601165 in words is "fifty-one billion, five hundred five million, six hundred one thousand, one hundred sixty-five".