51438638824278 has 16 divisors (see below), whose sum is σ = 102897857280000. Its totient is φ = 17142783002856.

The previous prime is 51438638824273. The next prime is 51438638824291. The reversal of 51438638824278 is 87242883683415.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51438638824273) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 857452150 + ... + 857512137.

It is an arithmetic number, because the mean of its divisors is an integer number (6431116080000).

Almost surely, 2^{51438638824278} is an apocalyptic number.

51438638824278 is an abundant number, since it is smaller than the sum of its proper divisors (51459218455722).

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

51438638824278 is a wasteful number, since it uses less digits than its factorization.

51438638824278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1714969291.

The product of its digits is 495452160, while the sum is 69.

The spelling of 51438638824278 in words is "fifty-one trillion, four hundred thirty-eight billion, six hundred thirty-eight million, eight hundred twenty-four thousand, two hundred seventy-eight".