10999999985 has 16 divisors (see below), whose sum is σ = 14269457664. Its totient is φ = 8092178112.

The previous prime is 10999999949. The next prime is 10999999999. The reversal of 10999999985 is 58999999901.

It is a cyclic number.

It is not a de Polignac number, because 10999999985 - 2¹⁴ = 10999983601 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 304637 + ... + 338826.

It is an arithmetic number, because the mean of its divisors is an integer number (891841104).

Almost surely, 2^10999999985 is an apocalyptic number.

It is an amenable number.

10999999985 is a deficient number, since it is larger than the sum of its proper divisors (3269457679).

10999999985 is a wasteful number, since it uses less digits than its factorization.

10999999985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 643744.

The product of its (nonzero) digits is 191318760, while the sum is 77.

The spelling of 10999999985 in words is "ten billion, nine hundred ninety-nine million, nine hundred ninety-nine thousand, nine hundred eighty-five".