51405202134544 has 20 divisors (see below), whose sum is σ = 99650925513424. Its totient is φ = 25688834260128.

The previous prime is 51405202134541. The next prime is 51405202134599. The reversal of 51405202134544 is 44543120250415.

It is a junction number, because it is equal to n+sod(n) for n = 51405202134497 and 51405202134506.

It is not an unprimeable number, because it can be changed into a prime (51405202134541) 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, 860394642 + ... + 860454385.

Almost surely, 2^{51405202134544} is an apocalyptic number.

It is an amenable number.

51405202134544 is a deficient number, since it is larger than the sum of its proper divisors (48245723378880).

51405202134544 is a wasteful number, since it uses less digits than its factorization.

51405202134544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1720850902 (or 1720850896 counting only the distinct ones).

The product of its (nonzero) digits is 384000, while the sum is 40.

Adding to 51405202134544 its reverse (44543120250415), we get a palindrome (95948322384959).

The spelling of 51405202134544 in words is "fifty-one trillion, four hundred five billion, two hundred two million, one hundred thirty-four thousand, five hundred forty-four".