11344511997 has 64 divisors (see below), whose sum is σ = 21107520000. Its totient is φ = 5983854912.

The previous prime is 11344511987. The next prime is 11344511999. The reversal of 11344511997 is 79911544311.

11344511997 is a `hidden beast` number, since 1 + 1 + 3 + 4 + 451 + 199 + 7 = 666.

It is not a de Polignac number, because 11344511997 - 2⁷ = 11344511869 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11344511999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 73279 + ... + 167507.

It is an arithmetic number, because the mean of its divisors is an integer number (329805000).

Almost surely, 2^11344511997 is an apocalyptic number.

It is an amenable number.

11344511997 is a deficient number, since it is larger than the sum of its proper divisors (9763008003).

11344511997 is an equidigital number, since it uses as much as digits as its factorization.

11344511997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94272 (or 94252 counting only the distinct ones).

The product of its digits is 136080, while the sum is 45.

The spelling of 11344511997 in words is "eleven billion, three hundred forty-four million, five hundred eleven thousand, nine hundred ninety-seven".