51010655565 has 8 divisors (see below), whose sum is σ = 81617048928. Its totient is φ = 27205682960.

The previous prime is 51010655551. The next prime is 51010655581. The reversal of 51010655565 is 56555601015.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 51010655565 - 2⁵ = 51010655533 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1700355171 + ... + 1700355200.

It is an arithmetic number, because the mean of its divisors is an integer number (10202131116).

Almost surely, 2^51010655565 is an apocalyptic number.

It is an amenable number.

51010655565 is a deficient number, since it is larger than the sum of its proper divisors (30606393363).

51010655565 is a wasteful number, since it uses less digits than its factorization.

51010655565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3400710379.

The product of its (nonzero) digits is 112500, while the sum is 39.

The spelling of 51010655565 in words is "fifty-one billion, ten million, six hundred fifty-five thousand, five hundred sixty-five".