1601439216 has 160 divisors (see below), whose sum is σ = 4678367232. Its totient is φ = 468357120.

The previous prime is 1601439181. The next prime is 1601439221. The reversal of 1601439216 is 6129341061.

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, 3458601 + ... + 3459063.

Almost surely, 2^1601439216 is an apocalyptic number.

1601439216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1601439216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2339183616).

1601439216 is an abundant number, since it is smaller than the sum of its proper divisors (3076928016).

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

1601439216 is a wasteful number, since it uses less digits than its factorization.

1601439216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 751 (or 745 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 33.

The square root of 1601439216 is about 40017.9861562273. The cubic root of 1601439216 is about 1169.9576812804.

The spelling of 1601439216 in words is "one billion, six hundred one million, four hundred thirty-nine thousand, two hundred sixteen".