51303026564 has 24 divisors (see below), whose sum is σ = 95269560120. Its totient is φ = 24089757696.

The previous prime is 51303026561. The next prime is 51303026587. The reversal of 51303026564 is 46562030315.

It can be written as a sum of positive squares in 4 ways, for example, as 6419214400 + 44883812164 = 80120^2 + 211858^2 .

It is not an unprimeable number, because it can be changed into a prime (51303026561) 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, 794369 + ... + 856520.

It is an arithmetic number, because the mean of its divisors is an integer number (3969565005).

Almost surely, 2^51303026564 is an apocalyptic number.

It is an amenable number.

51303026564 is a deficient number, since it is larger than the sum of its proper divisors (43966533556).

51303026564 is a wasteful number, since it uses less digits than its factorization.

51303026564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1651367 (or 1651365 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 35.

Adding to 51303026564 its reverse (46562030315), we get a palindrome (97865056879).

The spelling of 51303026564 in words is "fifty-one billion, three hundred three million, twenty-six thousand, five hundred sixty-four".