51554544213440 has 56 divisors (see below), whose sum is σ = 122786967219072. Its totient is φ = 20618003082240.

The previous prime is 51554544213373. The next prime is 51554544213481. The reversal of 51554544213440 is 4431244545515.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13167851 + ... + 16628330.

Almost surely, 2^{51554544213440} is an apocalyptic number.

It is an amenable number.

51554544213440 is an abundant number, since it is smaller than the sum of its proper divisors (71232423005632).

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

51554544213440 is a wasteful number, since it uses less digits than its factorization.

51554544213440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29801605 (or 29801595 counting only the distinct ones).

The product of its (nonzero) digits is 3840000, while the sum is 47.

Adding to 51554544213440 its reverse (4431244545515), we get a palindrome (55985788758955).

The spelling of 51554544213440 in words is "fifty-one trillion, five hundred fifty-four billion, five hundred forty-four million, two hundred thirteen thousand, four hundred forty".