11811503668 has 6 divisors (see below), whose sum is σ = 20670131426. Its totient is φ = 5905751832.

The previous prime is 11811503647. The next prime is 11811503677. The reversal of 11811503668 is 86630511811.

It can be written as a sum of positive squares in only one way, i.e., 11810907684 + 595984 = 108678^2 + 772^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 11811503668.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1476437955 + ... + 1476437962.

Almost surely, 2^11811503668 is an apocalyptic number.

It is an amenable number.

11811503668 is a deficient number, since it is larger than the sum of its proper divisors (8858627758).

11811503668 is a wasteful number, since it uses less digits than its factorization.

11811503668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2952875921 (or 2952875919 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 40.

The spelling of 11811503668 in words is "eleven billion, eight hundred eleven million, five hundred three thousand, six hundred sixty-eight".