11346561649 has 2 divisors, whose sum is σ = 11346561650. Its totient is φ = 11346561648.

The previous prime is 11346561647. The next prime is 11346561659. The reversal of 11346561649 is 94616564311.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10691560000 + 655001649 = 103400^2 + 25593^2 .

It is an emirp because it is prime and its reverse (94616564311) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11346561649 - 2¹ = 11346561647 is a prime.

It is a super-2 number, since 2×11346561649² (a number of 21 digits) contains 22 as substring.

Together with 11346561647, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 11346561599 and 11346561608.

It is not a weakly prime, because it can be changed into another prime (11346561647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5673280824 + 5673280825.

It is an arithmetic number, because the mean of its divisors is an integer number (5673280825).

Almost surely, 2^11346561649 is an apocalyptic number.

It is an amenable number.

11346561649 is a deficient number, since it is larger than the sum of its proper divisors (1).

11346561649 is an equidigital number, since it uses as much as digits as its factorization.

11346561649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 466560, while the sum is 46.

The spelling of 11346561649 in words is "eleven billion, three hundred forty-six million, five hundred sixty-one thousand, six hundred forty-nine".