999942843555 has 48 divisors (see below), whose sum is σ = 1737608371200. Its totient is φ = 531957694464.

The previous prime is 999942843533. The next prime is 999942843593. The reversal of 999942843555 is 555348249999.

999942843555 is a `hidden beast` number, since 9 + 9 + 9 + 9 + 4 + 28 + 43 + 555 = 666.

It is not a de Polignac number, because 999942843555 - 2²⁶ = 999875734691 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 107021214 + ... + 107030556.

It is an arithmetic number, because the mean of its divisors is an integer number (36200174400).

Almost surely, 2^999942843555 is an apocalyptic number.

999942843555 is a deficient number, since it is larger than the sum of its proper divisors (737665527645).

999942843555 is a wasteful number, since it uses less digits than its factorization.

999942843555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15100 (or 15097 counting only the distinct ones).

The product of its digits is 629856000, while the sum is 72.

The spelling of 999942843555 in words is "nine hundred ninety-nine billion, nine hundred forty-two million, eight hundred forty-three thousand, five hundred fifty-five".