51551338568401 has 12 divisors (see below), whose sum is σ = 60021283423152. Its totient is φ = 44147514422088.

The previous prime is 51551338568393. The next prime is 51551338568447. The reversal of 51551338568401 is 10486583315515.

It is a happy number.

It is not a de Polignac number, because 51551338568401 - 2³ = 51551338568393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51551338568461) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 468363555 + ... + 468473608.

It is an arithmetic number, because the mean of its divisors is an integer number (5001773618596).

Almost surely, 2^{51551338568401} is an apocalyptic number.

It is an amenable number.

51551338568401 is a deficient number, since it is larger than the sum of its proper divisors (8469944854751).

51551338568401 is a wasteful number, since it uses less digits than its factorization.

51551338568401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 936838300 (or 936838293 counting only the distinct ones).

The product of its (nonzero) digits is 8640000, while the sum is 55.

The spelling of 51551338568401 in words is "fifty-one trillion, five hundred fifty-one billion, three hundred thirty-eight million, five hundred sixty-eight thousand, four hundred one".