51578380936 has 16 divisors (see below), whose sum is σ = 102398256540. Its totient is φ = 24272179200.

The previous prime is 51578380891. The next prime is 51578380957. The reversal of 51578380936 is 63908387515.

It can be written as a sum of positive squares in 2 ways, for example, as 50216328100 + 1362052836 = 224090^2 + 36906^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 189626265 + ... + 189626536.

Almost surely, 2^51578380936 is an apocalyptic number.

It is an amenable number.

51578380936 is a deficient number, since it is larger than the sum of its proper divisors (50819875604).

51578380936 is a wasteful number, since it uses less digits than its factorization.

51578380936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 379252824 (or 379252820 counting only the distinct ones).

The product of its (nonzero) digits is 5443200, while the sum is 55.

The spelling of 51578380936 in words is "fifty-one billion, five hundred seventy-eight million, three hundred eighty thousand, nine hundred thirty-six".