51248606890 has 16 divisors (see below), whose sum is σ = 99343453608. Its totient is φ = 18922562496.

The previous prime is 51248606879. The next prime is 51248606921. The reversal of 51248606890 is 9860684215.

It can be written as a sum of positive squares in 4 ways, for example, as 43412639449 + 7835967441 = 208357^2 + 88521^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 197109897 + ... + 197110156.

Almost surely, 2^51248606890 is an apocalyptic number.

51248606890 is a deficient number, since it is larger than the sum of its proper divisors (48094846718).

51248606890 is a wasteful number, since it uses less digits than its factorization.

51248606890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 394220073.

The product of its (nonzero) digits is 829440, while the sum is 49.

The spelling of 51248606890 in words is "fifty-one billion, two hundred forty-eight million, six hundred six thousand, eight hundred ninety".