11611396897 has 4 divisors (see below), whose sum is σ = 11670338196. Its totient is φ = 11552455600.

The previous prime is 11611396891. The next prime is 11611396939. The reversal of 11611396897 is 79869311611.

11611396897 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 79869311611 = 647 ⋅123445613.

It can be written as a sum of positive squares in 2 ways, for example, as 11229428961 + 381967936 = 105969^2 + 19544^2 .

It is a cyclic number.

It is not a de Polignac number, because 11611396897 - 2¹⁵ = 11611364129 is a prime.

It is a super-2 number, since 2×11611396897² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11611396891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29470354 + ... + 29470747.

It is an arithmetic number, because the mean of its divisors is an integer number (2917584549).

Almost surely, 2^11611396897 is an apocalyptic number.

It is an amenable number.

11611396897 is a deficient number, since it is larger than the sum of its proper divisors (58941299).

11611396897 is an equidigital number, since it uses as much as digits as its factorization.

11611396897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58941298.

The product of its digits is 489888, while the sum is 52.

The spelling of 11611396897 in words is "eleven billion, six hundred eleven million, three hundred ninety-six thousand, eight hundred ninety-seven".