16641440655 has 64 divisors (see below), whose sum is σ = 31097364480. Its totient is φ = 7442487936.

The previous prime is 16641440611. The next prime is 16641440659. The reversal of 16641440655 is 55604414661.

It is a happy number.

It is not a de Polignac number, because 16641440655 - 2⁷ = 16641440527 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16641440659) 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 63 ways as a sum of consecutive naturals, for example, 888376 + ... + 906914.

It is an arithmetic number, because the mean of its divisors is an integer number (485896320).

Almost surely, 2^16641440655 is an apocalyptic number.

16641440655 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

16641440655 is a deficient number, since it is larger than the sum of its proper divisors (14455923825).

16641440655 is a wasteful number, since it uses less digits than its factorization.

16641440655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18740.

The product of its (nonzero) digits is 345600, while the sum is 42.

The spelling of 16641440655 in words is "sixteen billion, six hundred forty-one million, four hundred forty thousand, six hundred fifty-five".