1999352281905 has 80 divisors (see below), whose sum is σ = 3912704097984. Its totient is φ = 968673928320.

The previous prime is 1999352281897. The next prime is 1999352281921. The reversal of 1999352281905 is 5091822539991.

1999352281905 is a `hidden beast` number, since 1 + 9 + 9 + 93 + 522 + 8 + 19 + 0 + 5 = 666.

It is not a de Polignac number, because 1999352281905 - 2³ = 1999352281897 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 5953282 + ... + 6280148.

Almost surely, 2^{1999352281905} is an apocalyptic number.

1999352281905 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1999352281905 is a deficient number, since it is larger than the sum of its proper divisors (1913351816079).

1999352281905 is a wasteful number, since it uses less digits than its factorization.

1999352281905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 328268 (or 328259 counting only the distinct ones).

The product of its (nonzero) digits is 15746400, while the sum is 63.

The spelling of 1999352281905 in words is "one trillion, nine hundred ninety-nine billion, three hundred fifty-two million, two hundred eighty-one thousand, nine hundred five".