51423555140 has 12 divisors (see below), whose sum is σ = 107989465836. Its totient is φ = 20569422048.

The previous prime is 51423555137. The next prime is 51423555167. The reversal of 51423555140 is 4155532415.

51423555140 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 10541950276 + 40881604864 = 102674^2 + 202192^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 51423555140.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1285588859 + ... + 1285588898.

It is an arithmetic number, because the mean of its divisors is an integer number (8999122153).

Almost surely, 2^51423555140 is an apocalyptic number.

It is an amenable number.

51423555140 is an abundant number, since it is smaller than the sum of its proper divisors (56565910696).

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

51423555140 is a wasteful number, since it uses less digits than its factorization.

51423555140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2571177766 (or 2571177764 counting only the distinct ones).

The product of its (nonzero) digits is 60000, while the sum is 35.

The spelling of 51423555140 in words is "fifty-one billion, four hundred twenty-three million, five hundred fifty-five thousand, one hundred forty".