51340543151440 has 20 divisors (see below), whose sum is σ = 119366762827284. Its totient is φ = 20536217260544.

The previous prime is 51340543151393. The next prime is 51340543151459. The reversal of 51340543151440 is 4415134504315.

51340543151440 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 25249941604624 + 26090601546816 = 5024932^2 + 5107896^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 51340543151393 and 51340543151402.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 320878394617 + ... + 320878394776.

Almost surely, 2^{51340543151440} is an apocalyptic number.

It is an amenable number.

51340543151440 is an abundant number, since it is smaller than the sum of its proper divisors (68026219675844).

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

51340543151440 is a wasteful number, since it uses less digits than its factorization.

51340543151440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 641756789406 (or 641756789400 counting only the distinct ones).

The product of its (nonzero) digits is 288000, while the sum is 40.

Adding to 51340543151440 its reverse (4415134504315), we get a palindrome (55755677655755).

The spelling of 51340543151440 in words is "fifty-one trillion, three hundred forty billion, five hundred forty-three million, one hundred fifty-one thousand, four hundred forty".