11687967757 has 2 divisors, whose sum is σ = 11687967758. Its totient is φ = 11687967756.

The previous prime is 11687967749. The next prime is 11687967763. The reversal of 11687967757 is 75776978611.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7495923241 + 4192044516 = 86579^2 + 64746^2 .

It is a cyclic number.

It is not a de Polignac number, because 11687967757 - 2³ = 11687967749 is a prime.

It is a super-2 number, since 2×11687967757² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11687967737) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5843983878 + 5843983879.

It is an arithmetic number, because the mean of its divisors is an integer number (5843983879).

Almost surely, 2^11687967757 is an apocalyptic number.

It is an amenable number.

11687967757 is a deficient number, since it is larger than the sum of its proper divisors (1).

11687967757 is an equidigital number, since it uses as much as digits as its factorization.

11687967757 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31116960, while the sum is 64.

The spelling of 11687967757 in words is "eleven billion, six hundred eighty-seven million, nine hundred sixty-seven thousand, seven hundred fifty-seven".