51355450340400 has 120 divisors (see below), whose sum is σ = 165044485824064. Its totient is φ = 13650178233600.

The previous prime is 51355450340371. The next prime is 51355450340461. The reversal of 51355450340400 is 404305455315.

It is a happy number.

51355450340400 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (120).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 69332266 + ... + 70069065.

Almost surely, 2^{51355450340400} is an apocalyptic number.

51355450340400 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

51355450340400 is an abundant number, since it is smaller than the sum of its proper divisors (113689035483664).

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

51355450340400 is a wasteful number, since it uses less digits than its factorization.

51355450340400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139401659 (or 139401648 counting only the distinct ones).

The product of its (nonzero) digits is 360000, while the sum is 39.

Adding to 51355450340400 its reverse (404305455315), we get a palindrome (51759755795715).

The spelling of 51355450340400 in words is "fifty-one trillion, three hundred fifty-five billion, four hundred fifty million, three hundred forty thousand, four hundred".