11444000644491 has 8 divisors (see below), whose sum is σ = 15784828475280. Its totient is φ = 7366253288352.

The previous prime is 11444000644487. The next prime is 11444000644507. The reversal of 11444000644491 is 19444600044411.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 11444000644491 - 2² = 11444000644487 is a prime.

It is a super-2 number, since 2×11444000644491² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11444000644451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65770118560 + ... + 65770118733.

It is an arithmetic number, because the mean of its divisors is an integer number (1973103559410).

Almost surely, 2^{11444000644491} is an apocalyptic number.

11444000644491 is a deficient number, since it is larger than the sum of its proper divisors (4340827830789).

11444000644491 is a wasteful number, since it uses less digits than its factorization.

11444000644491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131540237325.

The product of its (nonzero) digits is 221184, while the sum is 42.

The spelling of 11444000644491 in words is "eleven trillion, four hundred forty-four billion, six hundred forty-four thousand, four hundred ninety-one".