51144504436 has 6 divisors (see below), whose sum is σ = 89502882770. Its totient is φ = 25572252216.

The previous prime is 51144504431. The next prime is 51144504457. The reversal of 51144504436 is 63440544115.

It can be written as a sum of positive squares in only one way, i.e., 50274608400 + 869896036 = 224220^2 + 29494^2 .

It is a junction number, because it is equal to n+sod(n) for n = 51144504395 and 51144504404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51144504431) 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, 6393063051 + ... + 6393063058.

Almost surely, 2^51144504436 is an apocalyptic number.

It is an amenable number.

51144504436 is a deficient number, since it is larger than the sum of its proper divisors (38358378334).

51144504436 is a wasteful number, since it uses less digits than its factorization.

51144504436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12786126113 (or 12786126111 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 37.

The spelling of 51144504436 in words is "fifty-one billion, one hundred forty-four million, five hundred four thousand, four hundred thirty-six".