16641786405 has 16 divisors (see below), whose sum is σ = 28028272320. Its totient is φ = 8408481408.

The previous prime is 16641786397. The next prime is 16641786449. The reversal of 16641786405 is 50468714661.

It is a happy number.

It is not a de Polignac number, because 16641786405 - 2³ = 16641786397 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29195832 + ... + 29196401.

It is an arithmetic number, because the mean of its divisors is an integer number (1751767020).

Almost surely, 2^16641786405 is an apocalyptic number.

16641786405 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16641786405 is a deficient number, since it is larger than the sum of its proper divisors (11386485915).

16641786405 is a wasteful number, since it uses less digits than its factorization.

16641786405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58392260.

The product of its (nonzero) digits is 967680, while the sum is 48.

The spelling of 16641786405 in words is "sixteen billion, six hundred forty-one million, seven hundred eighty-six thousand, four hundred five".