51125144811 has 32 divisors (see below), whose sum is σ = 74087650560. Its totient is φ = 31172169600.

The previous prime is 51125144779. The next prime is 51125144813. The reversal of 51125144811 is 11844152115.

It is not a de Polignac number, because 51125144811 - 2⁵ = 51125144779 is a prime.

It is a super-2 number, since 2×51125144811² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51125144813) 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 31 ways as a sum of consecutive naturals, for example, 3369480 + ... + 3384618.

It is an arithmetic number, because the mean of its divisors is an integer number (2315239080).

Almost surely, 2^51125144811 is an apocalyptic number.

51125144811 is a deficient number, since it is larger than the sum of its proper divisors (22962505749).

51125144811 is a wasteful number, since it uses less digits than its factorization.

51125144811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15947.

The product of its digits is 6400, while the sum is 33.

Adding to 51125144811 its reverse (11844152115), we get a palindrome (62969296926).

The spelling of 51125144811 in words is "fifty-one billion, one hundred twenty-five million, one hundred forty-four thousand, eight hundred eleven".