54999991859 has 2 divisors, whose sum is σ = 54999991860. Its totient is φ = 54999991858.

The previous prime is 54999991831. The next prime is 54999991903. The reversal of 54999991859 is 95819999945.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 54999991859 - 2³² = 50705024563 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 54999991859.

It is not a weakly prime, because it can be changed into another prime (54999991819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27499995929 + 27499995930.

It is an arithmetic number, because the mean of its divisors is an integer number (27499995930).

Almost surely, 2^54999991859 is an apocalyptic number.

54999991859 is a deficient number, since it is larger than the sum of its proper divisors (1).

54999991859 is an equidigital number, since it uses as much as digits as its factorization.

54999991859 is an evil number, because the sum of its binary digits is even.

The product of its digits is 425152800, while the sum is 77.

The spelling of 54999991859 in words is "fifty-four billion, nine hundred ninety-nine million, nine hundred ninety-one thousand, eight hundred fifty-nine".