2208775578025 has 27 divisors (see below), whose sum is σ = 2761165718373. Its totient is φ = 1752758935200.

The previous prime is 2208775578013. The next prime is 2208775578049. The reversal of 2208775578025 is 5208755778022.

It is a happy number.

The square root of 2208775578025 is 1486195.

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 958368555369 + 1250407022656 = 978963^2 + 1118216^2 .

It is not a de Polignac number, because 2208775578025 - 2⁹ = 2208775577513 is a prime.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors.

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, 973456591 + ... + 973458859.

Almost surely, 2^{2208775578025} is an apocalyptic number.

2208775578025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

2208775578025 is the 1486195-th square number.

2208775578025 is the 743098-th centered octagonal number.

It is an amenable number.

2208775578025 is a deficient number, since it is larger than the sum of its proper divisors (552390140348).

2208775578025 is an frugal number, since it uses more digits than its factorization.

2208775578025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4810 (or 2405 counting only the distinct ones).

The product of its (nonzero) digits is 21952000, while the sum is 58.

The spelling of 2208775578025 in words is "two trillion, two hundred eight billion, seven hundred seventy-five million, five hundred seventy-eight thousand, twenty-five".