11565711401 has 2 divisors, whose sum is σ = 11565711402. Its totient is φ = 11565711400.

The previous prime is 11565711359. The next prime is 11565711457. The reversal of 11565711401 is 10411756511.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5909919376 + 5655792025 = 76876^2 + 75205^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11565711401 is a prime.

It is a super-2 number, since 2×11565711401² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (11565711481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5782855700 + 5782855701.

It is an arithmetic number, because the mean of its divisors is an integer number (5782855701).

Almost surely, 2^11565711401 is an apocalyptic number.

It is an amenable number.

11565711401 is a deficient number, since it is larger than the sum of its proper divisors (1).

11565711401 is an equidigital number, since it uses as much as digits as its factorization.

11565711401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4200, while the sum is 32.

The spelling of 11565711401 in words is "eleven billion, five hundred sixty-five million, seven hundred eleven thousand, four hundred one".