51951068164 has 24 divisors (see below), whose sum is σ = 92256970680. Its totient is φ = 25592684544.

The previous prime is 51951068131. The next prime is 51951068171. The reversal of 51951068164 is 46186015915.

It can be written as a sum of positive squares in 4 ways, for example, as 4423580100 + 47527488064 = 66510^2 + 218008^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 184932 + ... + 371620.

It is an arithmetic number, because the mean of its divisors is an integer number (3844040445).

Almost surely, 2^51951068164 is an apocalyptic number.

It is an amenable number.

51951068164 is a deficient number, since it is larger than the sum of its proper divisors (40305902516).

51951068164 is a wasteful number, since it uses less digits than its factorization.

51951068164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187719 (or 187717 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 46.

The spelling of 51951068164 in words is "fifty-one billion, nine hundred fifty-one million, sixty-eight thousand, one hundred sixty-four".