11309851856 has 20 divisors (see below), whose sum is σ = 21982856772. Its totient is φ = 5636856576.

The previous prime is 11309851811. The next prime is 11309851877. The reversal of 11309851856 is 65815890311.

It can be written as a sum of positive squares in 2 ways, for example, as 34810000 + 11275041856 = 5900^2 + 106184^2 .

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 11309851856.

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, 1124171 + ... + 1134186.

Almost surely, 2^11309851856 is an apocalyptic number.

11309851856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

11309851856 is a deficient number, since it is larger than the sum of its proper divisors (10673004916).

11309851856 is a wasteful number, since it uses less digits than its factorization.

11309851856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2258678 (or 2258672 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 47.

The spelling of 11309851856 in words is "eleven billion, three hundred nine million, eight hundred fifty-one thousand, eight hundred fifty-six".