51538775378 has 8 divisors (see below), whose sum is σ = 77782446768. Its totient is φ = 25611293124.

The previous prime is 51538775369. The next prime is 51538775399. The reversal of 51538775378 is 87357783515.

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

It is a Curzon number.

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, 79046876 + ... + 79047527.

It is an arithmetic number, because the mean of its divisors is an integer number (9722805846).

Almost surely, 2^51538775378 is an apocalyptic number.

51538775378 is a deficient number, since it is larger than the sum of its proper divisors (26243671390).

51538775378 is a wasteful number, since it uses less digits than its factorization.

51538775378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158094568.

The product of its digits is 24696000, while the sum is 59.

The spelling of 51538775378 in words is "fifty-one billion, five hundred thirty-eight million, seven hundred seventy-five thousand, three hundred seventy-eight".