2164453625 has 16 divisors (see below), whose sum is σ = 2705333904. Its totient is φ = 1728937600.

The previous prime is 2164453619. The next prime is 2164453631. The reversal of 2164453625 is 5263544612.

It is an interprime number because it is at equal distance from previous prime (2164453619) and next prime (2164453631).

It can be written as a sum of positive squares in 8 ways, for example, as 576192016 + 1588261609 = 24004^2 + 39853^2 .

It is not a de Polignac number, because 2164453625 - 2⁶ = 2164453561 is a prime.

It is a Duffinian 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, 71837 + ... + 97413.

It is an arithmetic number, because the mean of its divisors is an integer number (169083369).

Almost surely, 2^2164453625 is an apocalyptic number.

2164453625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2164453625 is a deficient number, since it is larger than the sum of its proper divisors (540880279).

2164453625 is an equidigital number, since it uses as much as digits as its factorization.

2164453625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26269 (or 26259 counting only the distinct ones).

The product of its digits is 172800, while the sum is 38.

The square root of 2164453625 is about 46523.6888584729. The cubic root of 2164453625 is about 1293.5486341287.

The spelling of 2164453625 in words is "two billion, one hundred sixty-four million, four hundred fifty-three thousand, six hundred twenty-five".