51378438434678 has 16 divisors (see below), whose sum is σ = 77319922532256. Its totient is φ = 25605143753280.

The previous prime is 51378438434657. The next prime is 51378438434717. The reversal of 51378438434678 is 87643483487315.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4825175 + ... + 11226717.

It is an arithmetic number, because the mean of its divisors is an integer number (4832495158266).

Almost surely, 2^{51378438434678} is an apocalyptic number.

51378438434678 is a deficient number, since it is larger than the sum of its proper divisors (25941484097578).

51378438434678 is a wasteful number, since it uses less digits than its factorization.

51378438434678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6414679.

The product of its digits is 1300561920, while the sum is 71.

The spelling of 51378438434678 in words is "fifty-one trillion, three hundred seventy-eight billion, four hundred thirty-eight million, four hundred thirty-four thousand, six hundred seventy-eight".