16541601620 has 18 divisors (see below), whose sum is σ = 34738571322. Its totient is φ = 6616410576.

The previous prime is 16541601589. The next prime is 16541601721. The reversal of 16541601620 is 2610614561.

It can be written as a sum of positive squares in only one way, i.e., 13233281296 + 3308320324 = 115036^2 + 57518^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 560801 + ... + 589559.

It is an arithmetic number, because the mean of its divisors is an integer number (1929920629).

Almost surely, 2^16541601620 is an apocalyptic number.

16541601620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16541601620 is an abundant number, since it is smaller than the sum of its proper divisors (18196969702).

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

16541601620 is an frugal number, since it uses more digits than its factorization.

16541601620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57527 (or 28766 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 32.

The spelling of 16541601620 in words is "sixteen billion, five hundred forty-one million, six hundred one thousand, six hundred twenty".