2158457999 has 2 divisors, whose sum is σ = 2158458000. Its totient is φ = 2158457998.

The previous prime is 2158457981. The next prime is 2158458013. The reversal of 2158457999 is 9997548512.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2158457999 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2158457099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1079228999 + 1079229000.

It is an arithmetic number, because the mean of its divisors is an integer number (1079229000).

Almost surely, 2^2158457999 is an apocalyptic number.

2158457999 is a deficient number, since it is larger than the sum of its proper divisors (1).

2158457999 is an equidigital number, since it uses as much as digits as its factorization.

2158457999 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8164800, while the sum is 59.

The square root of 2158457999 is about 46459.2079032779. The cubic root of 2158457999 is about 1292.3531351944.

The spelling of 2158457999 in words is "two billion, one hundred fifty-eight million, four hundred fifty-seven thousand, nine hundred ninety-nine".