51135263511 has 16 divisors (see below), whose sum is σ = 68267743488. Its totient is φ = 34046513600.

The previous prime is 51135263503. The next prime is 51135263551. The reversal of 51135263511 is 11536253115.

It is a cyclic number.

It is not a de Polignac number, because 51135263511 - 2³ = 51135263503 is a prime.

It is a super-2 number, since 2×51135263511² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51135263551) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11470795 + ... + 11475251.

It is an arithmetic number, because the mean of its divisors is an integer number (4266733968).

Almost surely, 2^51135263511 is an apocalyptic number.

51135263511 is a deficient number, since it is larger than the sum of its proper divisors (17132479977).

51135263511 is a wasteful number, since it uses less digits than its factorization.

51135263511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8502.

The product of its digits is 13500, while the sum is 33.

The spelling of 51135263511 in words is "fifty-one billion, one hundred thirty-five million, two hundred sixty-three thousand, five hundred eleven".