1623201660 has 48 divisors (see below), whose sum is σ = 5049962400. Its totient is φ = 432853632.

The previous prime is 1623201653. The next prime is 1623201677. The reversal of 1623201660 is 661023261.

1623201660 is a `hidden beast` number, since 1 + 623 + 20 + 16 + 6 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1502425 + ... + 1503504.

It is an arithmetic number, because the mean of its divisors is an integer number (105207550).

Almost surely, 2^1623201660 is an apocalyptic number.

1623201660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1623201660 is an abundant number, since it is smaller than the sum of its proper divisors (3426760740).

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

1623201660 is a wasteful number, since it uses less digits than its factorization.

1623201660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3005947 (or 3005939 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 1623201660 is about 40288.9769043593. The cubic root of 1623201660 is about 1175.2334915492.

The spelling of 1623201660 in words is "one billion, six hundred twenty-three million, two hundred one thousand, six hundred sixty".