51764145140 has 24 divisors (see below), whose sum is σ = 109666698120. Its totient is φ = 20522421248.

The previous prime is 51764145131. The next prime is 51764145149. The reversal of 51764145140 is 4154146715.

It is an interprime number because it is at equal distance from previous prime (51764145131) and next prime (51764145149).

It can be written as a sum of positive squares in 4 ways, for example, as 1396217956 + 50367927184 = 37366^2 + 224428^2 .

It is a junction number, because it is equal to n+sod(n) for n = 51764145094 and 51764145103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51764145149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11449985 + ... + 11454504.

It is an arithmetic number, because the mean of its divisors is an integer number (4569445755).

Almost surely, 2^51764145140 is an apocalyptic number.

It is an amenable number.

51764145140 is an abundant number, since it is smaller than the sum of its proper divisors (57902552980).

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

51764145140 is a wasteful number, since it uses less digits than its factorization.

51764145140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22904611 (or 22904609 counting only the distinct ones).

The product of its (nonzero) digits is 67200, while the sum is 38.

The spelling of 51764145140 in words is "fifty-one billion, seven hundred sixty-four million, one hundred forty-five thousand, one hundred forty".