11767131521 has 2 divisors, whose sum is σ = 11767131522. Its totient is φ = 11767131520.

The previous prime is 11767131511. The next prime is 11767131557. The reversal of 11767131521 is 12513176711.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9729060496 + 2038071025 = 98636^2 + 45145^2 .

It is a cyclic number.

It is not a de Polignac number, because 11767131521 - 2¹⁰ = 11767130497 is a prime.

It is not a weakly prime, because it can be changed into another prime (11767131511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5883565760 + 5883565761.

It is an arithmetic number, because the mean of its divisors is an integer number (5883565761).

Almost surely, 2^11767131521 is an apocalyptic number.

It is an amenable number.

11767131521 is a deficient number, since it is larger than the sum of its proper divisors (1).

11767131521 is an equidigital number, since it uses as much as digits as its factorization.

11767131521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8820, while the sum is 35.

The spelling of 11767131521 in words is "eleven billion, seven hundred sixty-seven million, one hundred thirty-one thousand, five hundred twenty-one".