16204120605 has 64 divisors (see below), whose sum is σ = 30590784000. Its totient is φ = 8110126080.

The previous prime is 16204120579. The next prime is 16204120643. The reversal of 16204120605 is 50602140261.

16204120605 is a `hidden beast` number, since 16 + 2 + 0 + 41 + 2 + 0 + 605 = 666.

It is not a de Polignac number, because 16204120605 - 2⁷ = 16204120477 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 790840 + ... + 811070.

It is an arithmetic number, because the mean of its divisors is an integer number (477981000).

Almost surely, 2^16204120605 is an apocalyptic number.

16204120605 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16204120605 is a deficient number, since it is larger than the sum of its proper divisors (14386663395).

16204120605 is a wasteful number, since it uses less digits than its factorization.

16204120605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20611 (or 20605 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

Adding to 16204120605 its reverse (50602140261), we get a palindrome (66806260866).

The spelling of 16204120605 in words is "sixteen billion, two hundred four million, one hundred twenty thousand, six hundred five".