1601661200 has 60 divisors (see below), whose sum is σ = 3913268880. Its totient is φ = 629796480.

The previous prime is 1601661181. The next prime is 1601661233. The reversal of 1601661200 is 21661061.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10334 + ... + 57533.

It is an arithmetic number, because the mean of its divisors is an integer number (65221148).

Almost surely, 2^1601661200 is an apocalyptic number.

1601661200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1601661200 is an abundant number, since it is smaller than the sum of its proper divisors (2311607680).

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

1601661200 is a wasteful number, since it uses less digits than its factorization.

1601661200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67944 (or 67933 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 1601661200 is about 40020.7596129809. The cubic root of 1601661200 is about 1170.0117368000.

The spelling of 1601661200 in words is "one billion, six hundred one million, six hundred sixty-one thousand, two hundred".