999145541999 has 4 divisors (see below), whose sum is σ = 1089976954920. Its totient is φ = 908314129080.

The previous prime is 999145541981. The next prime is 999145542023.

999145541999 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 999145541999 - 2⁸ = 999145541743 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999145541939) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45415706444 + ... + 45415706465.

It is an arithmetic number, because the mean of its divisors is an integer number (272494238730).

Almost surely, 2^999145541999 is an apocalyptic number.

999145541999 is a deficient number, since it is larger than the sum of its proper divisors (90831412921).

999145541999 is a wasteful number, since it uses less digits than its factorization.

999145541999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90831412920.

The product of its digits is 212576400, while the sum is 74.

The spelling of 999145541999 in words is "nine hundred ninety-nine billion, one hundred forty-five million, five hundred forty-one thousand, nine hundred ninety-nine".