51800815126 has 8 divisors (see below), whose sum is σ = 77702188464. Its totient is φ = 25900085640.

The previous prime is 51800815123. The next prime is 51800815127. The reversal of 51800815126 is 62151800815.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51800815123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 234216 + ... + 398068.

It is an arithmetic number, because the mean of its divisors is an integer number (9712773558).

Almost surely, 2^51800815126 is an apocalyptic number.

51800815126 is a deficient number, since it is larger than the sum of its proper divisors (25901373338).

51800815126 is a wasteful number, since it uses less digits than its factorization.

51800815126 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 321926.

The product of its (nonzero) digits is 19200, while the sum is 37.

The spelling of 51800815126 in words is "fifty-one billion, eight hundred million, eight hundred fifteen thousand, one hundred twenty-six".