51436556136244 has 6 divisors (see below), whose sum is σ = 90013973238434. Its totient is φ = 25718278068120.

The previous prime is 51436556136241. The next prime is 51436556136289. The reversal of 51436556136244 is 44263165563415.

It can be written as a sum of positive squares in only one way, i.e., 31667968404900 + 19768587731344 = 5627430^2 + 4446188^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51436556136241) 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 as a sum of consecutive naturals, namely, 6429569517027 + ... + 6429569517034.

Almost surely, 2^{51436556136244} is an apocalyptic number.

It is an amenable number.

51436556136244 is a deficient number, since it is larger than the sum of its proper divisors (38577417102190).

51436556136244 is a wasteful number, since it uses less digits than its factorization.

51436556136244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12859139034065 (or 12859139034063 counting only the distinct ones).

The product of its digits is 31104000, while the sum is 55.

The spelling of 51436556136244 in words is "fifty-one trillion, four hundred thirty-six billion, five hundred fifty-six million, one hundred thirty-six thousand, two hundred forty-four".