11511304668 has 36 divisors (see below), whose sum is σ = 29398008640. Its totient is φ = 3797542656.

The previous prime is 11511304667. The next prime is 11511304687. The reversal of 11511304668 is 86640311511.

It is a happy number.

11511304668 is a `hidden beast` number, since 11 + 51 + 130 + 466 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11511304667) 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, 1644748 + ... + 1651731.

Almost surely, 2^11511304668 is an apocalyptic number.

11511304668 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

11511304668 is an abundant number, since it is smaller than the sum of its proper divisors (17886703972).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11511304668 is a wasteful number, since it uses less digits than its factorization.

11511304668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3296586 (or 3296581 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 36.

The spelling of 11511304668 in words is "eleven billion, five hundred eleven million, three hundred four thousand, six hundred sixty-eight".