51542439798 has 32 divisors (see below), whose sum is σ = 105659269632. Its totient is φ = 16752225600.

The previous prime is 51542439779. The next prime is 51542439821. The reversal of 51542439798 is 89793424515.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 379863 + ... + 497373.

It is an arithmetic number, because the mean of its divisors is an integer number (3301852176).

Almost surely, 2^51542439798 is an apocalyptic number.

51542439798 is an abundant number, since it is smaller than the sum of its proper divisors (54116829834).

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

51542439798 is a wasteful number, since it uses less digits than its factorization.

51542439798 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119340.

The product of its digits is 10886400, while the sum is 57.

The spelling of 51542439798 in words is "fifty-one billion, five hundred forty-two million, four hundred thirty-nine thousand, seven hundred ninety-eight".