2804489464921 has 9 divisors (see below), whose sum is σ = 2819420719101. Its totient is φ = 2789636896512.

The previous prime is 2804489464849. The next prime is 2804489464937. The reversal of 2804489464921 is 1294649844082.

The square root of 2804489464921 is 1674661.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 688337374921 + 2116152090000 = 829661^2 + 1454700^2 .

It is not a de Polignac number, because 2804489464921 - 2⁹ = 2804489464409 is a prime.

It is a super-2 number, since 2×2804489464921² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2804489464921.

It is not an unprimeable number, because it can be changed into a prime (2804489444921) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 323205235 + ... + 323213911.

It is an arithmetic number, because the mean of its divisors is an integer number (313268968789).

Almost surely, 2^{2804489464921} is an apocalyptic number.

2804489464921 is the 1674661-st square number.

2804489464921 is the 837331-st centered octagonal number.

It is an amenable number.

2804489464921 is a deficient number, since it is larger than the sum of its proper divisors (14931254180).

2804489464921 is an frugal number, since it uses more digits than its factorization.

2804489464921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17740 (or 8870 counting only the distinct ones).

The product of its (nonzero) digits is 31850496, while the sum is 61.

The spelling of 2804489464921 in words is "two trillion, eight hundred four billion, four hundred eighty-nine million, four hundred sixty-four thousand, nine hundred twenty-one".