1601646804 has 96 divisors (see below), whose sum is σ = 4252348800. Its totient is φ = 521164800.

The previous prime is 1601646797. The next prime is 1601646817. The reversal of 1601646804 is 4086461061.

1601646804 is a `hidden beast` number, since 1 + 6 + 0 + 1 + 646 + 8 + 0 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 999604 + ... + 1001204.

It is an arithmetic number, because the mean of its divisors is an integer number (44295300).

Almost surely, 2^1601646804 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1601646804, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2126174400).

1601646804 is an abundant number, since it is smaller than the sum of its proper divisors (2650701996).

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

1601646804 is a wasteful number, since it uses less digits than its factorization.

1601646804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1830 (or 1822 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 1601646804 is about 40020.5797559206. The cubic root of 1601646804 is about 1170.0082313688.

The spelling of 1601646804 in words is "one billion, six hundred one million, six hundred forty-six thousand, eight hundred four".