51129726530 has 16 divisors (see below), whose sum is σ = 92036165760. Its totient is φ = 20451299952.

The previous prime is 51129726511. The next prime is 51129726533. The reversal of 51129726530 is 3562792115.

It is a super-2 number, since 2×51129726530² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51129726533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 508277 + ... + 600503.

It is an arithmetic number, because the mean of its divisors is an integer number (5752260360).

Almost surely, 2^51129726530 is an apocalyptic number.

51129726530 is a deficient number, since it is larger than the sum of its proper divisors (40906439230).

51129726530 is a wasteful number, since it uses less digits than its factorization.

51129726530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147673.

The product of its (nonzero) digits is 113400, while the sum is 41.

The spelling of 51129726530 in words is "fifty-one billion, one hundred twenty-nine million, seven hundred twenty-six thousand, five hundred thirty".