51551606478 has 32 divisors (see below), whose sum is σ = 104890302720. Its totient is φ = 16886240640.

The previous prime is 51551606471. The next prime is 51551606479. The reversal of 51551606478 is 87460615515.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51551606471) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 961926 + ... + 1014102.

It is an arithmetic number, because the mean of its divisors is an integer number (3277821960).

Almost surely, 2^51551606478 is an apocalyptic number.

51551606478 is an abundant number, since it is smaller than the sum of its proper divisors (53338696242).

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

51551606478 is a wasteful number, since it uses less digits than its factorization.

51551606478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55032.

The product of its (nonzero) digits is 1008000, while the sum is 48.

The spelling of 51551606478 in words is "fifty-one billion, five hundred fifty-one million, six hundred six thousand, four hundred seventy-eight".