1664541204 has 24 divisors (see below), whose sum is σ = 3897193440. Its totient is φ = 552952224.

The previous prime is 1664541169. The next prime is 1664541251. The reversal of 1664541204 is 4021454661.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 233194 + ... + 240225.

It is an arithmetic number, because the mean of its divisors is an integer number (162383060).

Almost surely, 2^1664541204 is an apocalyptic number.

It is an amenable number.

1664541204 is an abundant number, since it is smaller than the sum of its proper divisors (2232652236).

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

1664541204 is a wasteful number, since it uses less digits than its factorization.

1664541204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 473719 (or 473717 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 33.

The square root of 1664541204 is about 40798.7892467411. The cubic root of 1664541204 is about 1185.1268841684.

Adding to 1664541204 its reverse (4021454661), we get a palindrome (5685995865).

The spelling of 1664541204 in words is "one billion, six hundred sixty-four million, five hundred forty-one thousand, two hundred four".