2164473576225 has 27 divisors (see below), whose sum is σ = 3876852199129. Its totient is φ = 1154374137600.

The previous prime is 2164473576149. The next prime is 2164473576257. The reversal of 2164473576225 is 5226753744612.

The square root of 2164473576225 is 1471215.

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

2164473576225 is a `hidden beast` number, since 2 + 1 + 6 + 4 + 4 + 7 + 3 + 5 + 7 + 622 + 5 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 988177153041 + 1176296423184 = 994071^2 + 1084572^2 .

It is not a de Polignac number, because 2164473576225 - 2¹¹ = 2164473574177 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 22019185 + ... + 22117265.

Almost surely, 2^{2164473576225} is an apocalyptic number.

2164473576225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

2164473576225 is the 1471215-th square number.

2164473576225 is the 735608-th centered octagonal number.

It is an amenable number.

2164473576225 is a deficient number, since it is larger than the sum of its proper divisors (1712378622904).

2164473576225 is an frugal number, since it uses more digits than its factorization.

2164473576225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196178 (or 98089 counting only the distinct ones).

The product of its digits is 16934400, while the sum is 54.

The spelling of 2164473576225 in words is "two trillion, one hundred sixty-four billion, four hundred seventy-three million, five hundred seventy-six thousand, two hundred twenty-five".