51136461481 has 16 divisors (see below), whose sum is σ = 58995834880. Its totient is φ = 43416732240.

The previous prime is 51136461469. The next prime is 51136461521. The reversal of 51136461481 is 18416463115.

It is not a de Polignac number, because 51136461481 - 2⁷ = 51136461353 is a prime.

It is a super-2 number, since 2×51136461481² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51136461451) 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, 515380 + ... + 606538.

It is an arithmetic number, because the mean of its divisors is an integer number (3687239680).

Almost surely, 2^51136461481 is an apocalyptic number.

It is an amenable number.

51136461481 is a deficient number, since it is larger than the sum of its proper divisors (7859373399).

51136461481 is a wasteful number, since it uses less digits than its factorization.

51136461481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91924.

The product of its digits is 69120, while the sum is 40.

The spelling of 51136461481 in words is "fifty-one billion, one hundred thirty-six million, four hundred sixty-one thousand, four hundred eighty-one".