1000001601606 has 32 divisors (see below), whose sum is σ = 2341467168768. Its totient is φ = 278746090560.

The previous prime is 1000001601601. The next prime is 1000001601719. The reversal of 1000001601606 is 6061061000001.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1000001601601) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 290358790 + ... + 290362233.

It is an arithmetic number, because the mean of its divisors is an integer number (73170849024).

Almost surely, 2^{1000001601606} is an apocalyptic number.

1000001601606 is an abundant number, since it is smaller than the sum of its proper divisors (1341465567162).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1000001601606 is a wasteful number, since it uses less digits than its factorization.

1000001601606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 580721076.

The product of its (nonzero) digits is 216, while the sum is 21.

Adding to 1000001601606 its reverse (6061061000001), we get a palindrome (7061062601607).

The spelling of 1000001601606 in words is "one trillion, one million, six hundred one thousand, six hundred six".