51250053440 has 56 divisors (see below), whose sum is σ = 122572287240. Its totient is φ = 20410472448.

The previous prime is 51250053403. The next prime is 51250053451. The reversal of 51250053440 is 4435005215.

It can be written as a sum of positive squares in 4 ways, for example, as 20627853376 + 30622200064 = 143624^2 + 174992^2 .

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 7 ways as a sum of consecutive naturals, for example, 276407 + ... + 422966.

Almost surely, 2^51250053440 is an apocalyptic number.

It is an amenable number.

51250053440 is an abundant number, since it is smaller than the sum of its proper divisors (71322233800).

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

51250053440 is a wasteful number, since it uses less digits than its factorization.

51250053440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 699619 (or 699609 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 29.

Adding to 51250053440 its reverse (4435005215), we get a palindrome (55685058655).

The spelling of 51250053440 in words is "fifty-one billion, two hundred fifty million, fifty-three thousand, four hundred forty".