1999549640134 has 16 divisors (see below), whose sum is σ = 3000607948800. Its totient is φ = 999347090184.

The previous prime is 1999549640129. The next prime is 1999549640159. The reversal of 1999549640134 is 4310469459991.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50373307 + ... + 50412985.

It is an arithmetic number, because the mean of its divisors is an integer number (187537996800).

Almost surely, 2^{1999549640134} is an apocalyptic number.

1999549640134 is a deficient number, since it is larger than the sum of its proper divisors (1001058308666).

1999549640134 is a wasteful number, since it uses less digits than its factorization.

1999549640134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49827.

The product of its (nonzero) digits is 37791360, while the sum is 64.

The spelling of 1999549640134 in words is "one trillion, nine hundred ninety-nine billion, five hundred forty-nine million, six hundred forty thousand, one hundred thirty-four".