51379412138 has 16 divisors (see below), whose sum is σ = 77672520000. Its totient is φ = 25489212672.

The previous prime is 51379412131. The next prime is 51379412179. The reversal of 51379412138 is 83121497315.

It is not an unprimeable number, because it can be changed into a prime (51379412131) 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, 923 + ... + 320561.

It is an arithmetic number, because the mean of its divisors is an integer number (4854532500).

Almost surely, 2^51379412138 is an apocalyptic number.

51379412138 is a deficient number, since it is larger than the sum of its proper divisors (26293107862).

51379412138 is a wasteful number, since it uses less digits than its factorization.

51379412138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 320269.

The product of its digits is 181440, while the sum is 44.

The spelling of 51379412138 in words is "fifty-one billion, three hundred seventy-nine million, four hundred twelve thousand, one hundred thirty-eight".