51784478067 has 30 divisors (see below), whose sum is σ = 80909361588. Its totient is φ = 29375136672.

The previous prime is 51784478059. The next prime is 51784478071. The reversal of 51784478067 is 76087448715.

51784478067 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 51784478067 - 2³ = 51784478059 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51784477998 and 51784478016.

It is not an unprimeable number, because it can be changed into a prime (51784478467) by changing a digit.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 377988823 + ... + 377988959.

Almost surely, 2^51784478067 is an apocalyptic number.

51784478067 is a deficient number, since it is larger than the sum of its proper divisors (29124883521).

51784478067 is an frugal number, since it uses more digits than its factorization.

51784478067 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 565 (or 147 counting only the distinct ones).

The product of its (nonzero) digits is 10536960, while the sum is 57.

The spelling of 51784478067 in words is "fifty-one billion, seven hundred eighty-four million, four hundred seventy-eight thousand, sixty-seven".