11731136477 has 2 divisors, whose sum is σ = 11731136478. Its totient is φ = 11731136476.

The previous prime is 11731136449. The next prime is 11731136509. The reversal of 11731136477 is 77463113711.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8074999321 + 3656137156 = 89861^2 + 60466^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11731136477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11731136437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5865568238 + 5865568239.

It is an arithmetic number, because the mean of its divisors is an integer number (5865568239).

Almost surely, 2^11731136477 is an apocalyptic number.

It is an amenable number.

11731136477 is a deficient number, since it is larger than the sum of its proper divisors (1).

11731136477 is an equidigital number, since it uses as much as digits as its factorization.

11731136477 is an evil number, because the sum of its binary digits is even.

The product of its digits is 74088, while the sum is 41.

The spelling of 11731136477 in words is "eleven billion, seven hundred thirty-one million, one hundred thirty-six thousand, four hundred seventy-seven".