51378555187742 has 8 divisors (see below), whose sum is σ = 80418608120016. Its totient is φ = 24572352481072.

The previous prime is 51378555187709. The next prime is 51378555187823. The reversal of 51378555187742 is 24778155587315.

51378555187742 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 558462556343 + ... + 558462556434.

It is an arithmetic number, because the mean of its divisors is an integer number (10052326015002).

Almost surely, 2^{51378555187742} is an apocalyptic number.

51378555187742 is a deficient number, since it is larger than the sum of its proper divisors (29040052932274).

51378555187742 is a wasteful number, since it uses less digits than its factorization.

51378555187742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1116925112802.

The product of its digits is 329280000, while the sum is 68.

The spelling of 51378555187742 in words is "fifty-one trillion, three hundred seventy-eight billion, five hundred fifty-five million, one hundred eighty-seven thousand, seven hundred forty-two".