11209613049 has 24 divisors (see below), whose sum is σ = 17066055240. Its totient is φ = 7079235072.

The previous prime is 11209613047. The next prime is 11209613053. The reversal of 11209613049 is 94031690211.

It is a happy number.

11209613049 is a `hidden beast` number, since 11 + 20 + 9 + 613 + 0 + 4 + 9 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 1479171600 + 9730441449 = 38460^2 + 98643^2 .

It is not a de Polignac number, because 11209613049 - 2¹ = 11209613047 is a prime.

It is a super-2 number, since 2×11209613049² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11209613047) 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, 391344 + ... + 419009.

It is an arithmetic number, because the mean of its divisors is an integer number (711085635).

Almost surely, 2^11209613049 is an apocalyptic number.

It is an amenable number.

11209613049 is a deficient number, since it is larger than the sum of its proper divisors (5856442191).

11209613049 is a wasteful number, since it uses less digits than its factorization.

11209613049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 810441 (or 810438 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 36.

It can be divided in two parts, 1120 and 9613049, that added together give a palindrome (9614169).

The spelling of 11209613049 in words is "eleven billion, two hundred nine million, six hundred thirteen thousand, forty-nine".