51565445355 has 32 divisors (see below), whose sum is σ = 86181096960. Its totient is φ = 26278588160.

The previous prime is 51565445317. The next prime is 51565445413. The reversal of 51565445355 is 55354456515.

It is not a de Polignac number, because 51565445355 - 2¹² = 51565441259 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 258031 + ... + 411959.

It is an arithmetic number, because the mean of its divisors is an integer number (2693159280).

Almost surely, 2^51565445355 is an apocalyptic number.

51565445355 is a deficient number, since it is larger than the sum of its proper divisors (34615651605).

51565445355 is a wasteful number, since it uses less digits than its factorization.

51565445355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154931.

The product of its digits is 4500000, while the sum is 48.

The spelling of 51565445355 in words is "fifty-one billion, five hundred sixty-five million, four hundred forty-five thousand, three hundred fifty-five".