10999999988 has 12 divisors (see below), whose sum is σ = 19262903940. Its totient is φ = 5496313152.

The previous prime is 10999999949. The next prime is 10999999999. The reversal of 10999999988 is 88999999901.

It can be written as a sum of positive squares in 2 ways, for example, as 7247457424 + 3752542564 = 85132^2 + 61258^2 .

It is a super-4 number, since 4×10999999988⁴ (a number of 41 digits) contains 4444 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 914993 + ... + 926936.

It is an arithmetic number, because the mean of its divisors is an integer number (1605241995).

Almost surely, 2^10999999988 is an apocalyptic number.

It is an amenable number.

10999999988 is a deficient number, since it is larger than the sum of its proper divisors (8262903952).

10999999988 is a wasteful number, since it uses less digits than its factorization.

10999999988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1843426 (or 1843424 counting only the distinct ones).

The product of its (nonzero) digits is 306110016, while the sum is 80.

The spelling of 10999999988 in words is "ten billion, nine hundred ninety-nine million, nine hundred ninety-nine thousand, nine hundred eighty-eight".