51011055005 has 16 divisors (see below), whose sum is σ = 61958964144. Its totient is φ = 40313272320.

The previous prime is 51011055001. The next prime is 51011055047. The reversal of 51011055005 is 50055011015.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 4349006809 + 46662048196 = 65947^2 + 216014^2 .

It is not a de Polignac number, because 51011055005 - 2² = 51011055001 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51011055001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 165179 + ... + 359591.

It is an arithmetic number, because the mean of its divisors is an integer number (3872435259).

Almost surely, 2^51011055005 is an apocalyptic number.

It is an amenable number.

51011055005 is a deficient number, since it is larger than the sum of its proper divisors (10947909139).

51011055005 is a wasteful number, since it uses less digits than its factorization.

51011055005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195056.

The product of its (nonzero) digits is 625, while the sum is 23.

The spelling of 51011055005 in words is "fifty-one billion, eleven million, fifty-five thousand, five".