51115115065 has 8 divisors (see below), whose sum is σ = 70100729280. Its totient is φ = 35050364592.

The previous prime is 51115115027. The next prime is 51115115071. The reversal of 51115115065 is 56051151115.

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

It is a cyclic number.

It is not a de Polignac number, because 51115115065 - 2⁷ = 51115114937 is a prime.

It is a super-2 number, since 2×51115115065² (a number of 22 digits) contains 22 as substring.

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, 730215895 + ... + 730215964.

It is an arithmetic number, because the mean of its divisors is an integer number (8762591160).

Almost surely, 2^51115115065 is an apocalyptic number.

It is an amenable number.

51115115065 is a deficient number, since it is larger than the sum of its proper divisors (18985614215).

51115115065 is a wasteful number, since it uses less digits than its factorization.

51115115065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1460431871.

The product of its (nonzero) digits is 3750, while the sum is 31.

The spelling of 51115115065 in words is "fifty-one billion, one hundred fifteen million, one hundred fifteen thousand, sixty-five".