51678463793 has 16 divisors (see below), whose sum is σ = 59699082240. Its totient is φ = 44241224400.

The previous prime is 51678463783. The next prime is 51678463807. The reversal of 51678463793 is 39736487615.

It is a cyclic number.

It is not a de Polignac number, because 51678463793 - 2²⁴ = 51661686577 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (51678463783) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 705413 + ... + 775218.

It is an arithmetic number, because the mean of its divisors is an integer number (3731192640).

Almost surely, 2^51678463793 is an apocalyptic number.

It is an amenable number.

51678463793 is a deficient number, since it is larger than the sum of its proper divisors (8020618447).

51678463793 is a wasteful number, since it uses less digits than its factorization.

51678463793 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1480828.

The product of its digits is 22861440, while the sum is 59.

The spelling of 51678463793 in words is "fifty-one billion, six hundred seventy-eight million, four hundred sixty-three thousand, seven hundred ninety-three".