11428566849 has 24 divisors (see below), whose sum is σ = 18874514880. Its totient is φ = 6527733408.

The previous prime is 11428566847. The next prime is 11428566871. The reversal of 11428566849 is 94866582411.

11428566849 is a `hidden beast` number, since 1 + 14 + 28 + 566 + 8 + 49 = 666.

It is not a de Polignac number, because 11428566849 - 2¹ = 11428566847 is a prime.

It is a super-2 number, since 2×11428566849² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 11428566795 and 11428566804.

It is not an unprimeable number, because it can be changed into a prime (11428566847) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 108579 + ... + 186135.

It is an arithmetic number, because the mean of its divisors is an integer number (786438120).

Almost surely, 2^11428566849 is an apocalyptic number.

It is an amenable number.

11428566849 is a deficient number, since it is larger than the sum of its proper divisors (7445948031).

11428566849 is a wasteful number, since it uses less digits than its factorization.

11428566849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79909 (or 79906 counting only the distinct ones).

The product of its digits is 3317760, while the sum is 54.

The spelling of 11428566849 in words is "eleven billion, four hundred twenty-eight million, five hundred sixty-six thousand, eight hundred forty-nine".