51452381238 has 16 divisors (see below), whose sum is σ = 104846362416. Its totient is φ = 16827193760.

The previous prime is 51452381153. The next prime is 51452381251. The reversal of 51452381238 is 83218325415.

It is a self number, because there is not a number n which added to its sum of digits gives 51452381238.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 80899653 + ... + 80900288.

It is an arithmetic number, because the mean of its divisors is an integer number (6552897651).

Almost surely, 2^51452381238 is an apocalyptic number.

51452381238 is an abundant number, since it is smaller than the sum of its proper divisors (53393981178).

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

51452381238 is a wasteful number, since it uses less digits than its factorization.

51452381238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161799999.

The product of its digits is 230400, while the sum is 42.

The spelling of 51452381238 in words is "fifty-one billion, four hundred fifty-two million, three hundred eighty-one thousand, two hundred thirty-eight".