51193816478 has 8 divisors (see below), whose sum is σ = 87760828272. Its totient is φ = 21940207056.

The previous prime is 51193816409. The next prime is 51193816483. The reversal of 51193816478 is 87461839115.

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 polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1828350575 + ... + 1828350602.

It is an arithmetic number, because the mean of its divisors is an integer number (10970103534).

Almost surely, 2^51193816478 is an apocalyptic number.

51193816478 is a deficient number, since it is larger than the sum of its proper divisors (36567011794).

51193816478 is a wasteful number, since it uses less digits than its factorization.

51193816478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3656701186.

The product of its digits is 1451520, while the sum is 53.

The spelling of 51193816478 in words is "fifty-one billion, one hundred ninety-three million, eight hundred sixteen thousand, four hundred seventy-eight".