54806728667 has 2 divisors, whose sum is σ = 54806728668. Its totient is φ = 54806728666.

The previous prime is 54806728663. The next prime is 54806728679. The reversal of 54806728667 is 76682760845.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 54806728667 - 2² = 54806728663 is a prime.

It is not a weakly prime, because it can be changed into another prime (54806728663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27403364333 + 27403364334.

It is an arithmetic number, because the mean of its divisors is an integer number (27403364334).

Almost surely, 2^54806728667 is an apocalyptic number.

54806728667 is a deficient number, since it is larger than the sum of its proper divisors (1).

54806728667 is an equidigital number, since it uses as much as digits as its factorization.

54806728667 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27095040, while the sum is 59.

The spelling of 54806728667 in words is "fifty-four billion, eight hundred six million, seven hundred twenty-eight thousand, six hundred sixty-seven".