51126804911 has 32 divisors (see below), whose sum is σ = 66920232960. Its totient is φ = 37927719936.

The previous prime is 51126804877. The next prime is 51126804977. The reversal of 51126804911 is 11940862115.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51126804911 is a prime.

It is a super-2 number, since 2×51126804911² (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 (51126804011) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15290 + ... + 320136.

It is an arithmetic number, because the mean of its divisors is an integer number (2091257280).

Almost surely, 2^51126804911 is an apocalyptic number.

51126804911 is a deficient number, since it is larger than the sum of its proper divisors (15793428049).

51126804911 is a wasteful number, since it uses less digits than its factorization.

51126804911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 304983.

The product of its (nonzero) digits is 17280, while the sum is 38.

The spelling of 51126804911 in words is "fifty-one billion, one hundred twenty-six million, eight hundred four thousand, nine hundred eleven".