51970821774 has 24 divisors (see below), whose sum is σ = 105733268520. Its totient is φ = 17029979952.

The previous prime is 51970821761. The next prime is 51970821803. The reversal of 51970821774 is 47712807915.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 1223269 + ... + 1265040.

It is an arithmetic number, because the mean of its divisors is an integer number (4405552855).

Almost surely, 2^51970821774 is an apocalyptic number.

51970821774 is an abundant number, since it is smaller than the sum of its proper divisors (53762446746).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51970821774 is a wasteful number, since it uses less digits than its factorization.

51970821774 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2488432 (or 2488373 counting only the distinct ones).

The product of its (nonzero) digits is 987840, while the sum is 51.

The spelling of 51970821774 in words is "fifty-one billion, nine hundred seventy million, eight hundred twenty-one thousand, seven hundred seventy-four".