51155155715 has 16 divisors (see below), whose sum is σ = 64170232128. Its totient is φ = 39074487936.

The previous prime is 51155155697. The next prime is 51155155741. The reversal of 51155155715 is 51755155115.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51155155715 is a prime.

It is a super-2 number, since 2×51155155715² (a number of 22 digits) contains 22 as substring.

It is a Duffinian 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 15 ways as a sum of consecutive naturals, for example, 335252 + ... + 463361.

It is an arithmetic number, because the mean of its divisors is an integer number (4010639508).

Almost surely, 2^51155155715 is an apocalyptic number.

51155155715 is a deficient number, since it is larger than the sum of its proper divisors (13015076413).

51155155715 is a wasteful number, since it uses less digits than its factorization.

51155155715 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 799198.

The product of its digits is 109375, while the sum is 41.

The spelling of 51155155715 in words is "fifty-one billion, one hundred fifty-five million, one hundred fifty-five thousand, seven hundred fifteen".