11605522300661 has 2 divisors, whose sum is σ = 11605522300662. Its totient is φ = 11605522300660.

The previous prime is 11605522300657. The next prime is 11605522300663. The reversal of 11605522300661 is 16600322550611.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8077924624561 + 3527597676100 = 2842169^2 + 1878190^2 .

It is a cyclic number.

It is not a de Polignac number, because 11605522300661 - 2² = 11605522300657 is a prime.

It is a super-2 number, since 2×11605522300661² (a number of 27 digits) contains 22 as substring.

Together with 11605522300663, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11605522300663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5802761150330 + 5802761150331.

It is an arithmetic number, because the mean of its divisors is an integer number (5802761150331).

Almost surely, 2^{11605522300661} is an apocalyptic number.

It is an amenable number.

11605522300661 is a deficient number, since it is larger than the sum of its proper divisors (1).

11605522300661 is an equidigital number, since it uses as much as digits as its factorization.

11605522300661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64800, while the sum is 38.

The spelling of 11605522300661 in words is "eleven trillion, six hundred five billion, five hundred twenty-two million, three hundred thousand, six hundred sixty-one".