65555565051 has 4 divisors (see below), whose sum is σ = 87407420072. Its totient is φ = 43703710032.

The previous prime is 65555565037. The next prime is 65555565059. The reversal of 65555565051 is 15056555556.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 65555565051 - 2¹⁰ = 65555564027 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65555565059) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10925927506 + ... + 10925927511.

It is an arithmetic number, because the mean of its divisors is an integer number (21851855018).

Almost surely, 2^65555565051 is an apocalyptic number.

65555565051 is a deficient number, since it is larger than the sum of its proper divisors (21851855021).

65555565051 is a wasteful number, since it uses less digits than its factorization.

65555565051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21851855020.

The product of its (nonzero) digits is 2812500, while the sum is 48.

The spelling of 65555565051 in words is "sixty-five billion, five hundred fifty-five million, five hundred sixty-five thousand, fifty-one".