51366688737 has 64 divisors (see below), whose sum is σ = 87547944960. Its totient is φ = 26068195584.

The previous prime is 51366688733. The next prime is 51366688787. The reversal of 51366688737 is 73788666315.

It is not a de Polignac number, because 51366688737 - 2² = 51366688733 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51366688733) by changing a digit.

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 63 ways as a sum of consecutive naturals, for example, 723103 + ... + 790955.

It is an arithmetic number, because the mean of its divisors is an integer number (1367936640).

Almost surely, 2^51366688737 is an apocalyptic number.

It is an amenable number.

51366688737 is a deficient number, since it is larger than the sum of its proper divisors (36181256223).

51366688737 is a wasteful number, since it uses less digits than its factorization.

51366688737 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67982.

The product of its digits is 30481920, while the sum is 60.

The spelling of 51366688737 in words is "fifty-one billion, three hundred sixty-six million, six hundred eighty-eight thousand, seven hundred thirty-seven".