1601305680 has 80 divisors (see below), whose sum is σ = 5345907840. Its totient is φ = 394166784.

The previous prime is 1601305669. The next prime is 1601305729. The reversal of 1601305680 is 865031061.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (30).

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, 253500 + ... + 259739.

It is an arithmetic number, because the mean of its divisors is an integer number (66823848).

Almost surely, 2^1601305680 is an apocalyptic number.

1601305680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1601305680 is an abundant number, since it is smaller than the sum of its proper divisors (3744602160).

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

1601305680 is a wasteful number, since it uses less digits than its factorization.

1601305680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 513268 (or 513262 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 1601305680 is about 40016.3176716699. The cubic root of 1601305680 is about 1169.9251614049.

The spelling of 1601305680 in words is "one billion, six hundred one million, three hundred five thousand, six hundred eighty".