11644261011 has 12 divisors (see below), whose sum is σ = 17032394080. Its totient is φ = 7664576400.

The previous prime is 11644260937. The next prime is 11644261019. The reversal of 11644261011 is 11016244611.

11644261011 is a `hidden beast` number, since 1 + 1 + 6 + 4 + 42 + 610 + 1 + 1 = 666.

It is not a de Polignac number, because 11644261011 - 2¹⁵ = 11644228243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11644261019) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8187940 + ... + 8189361.

Almost surely, 2^11644261011 is an apocalyptic number.

11644261011 is a deficient number, since it is larger than the sum of its proper divisors (5388133069).

11644261011 is a wasteful number, since it uses less digits than its factorization.

11644261011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16377386 (or 16377383 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The spelling of 11644261011 in words is "eleven billion, six hundred forty-four million, two hundred sixty-one thousand, eleven".