2499766534225 has 9 divisors (see below), whose sum is σ = 3099720305073. Its totient is φ = 1999806903120.

The previous prime is 2499766534217. The next prime is 2499766534259. The reversal of 2499766534225 is 5224356679942.

It is a happy number.

The square root of 2499766534225 is 1581065.

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 189196291089 + 2310570243136 = 434967^2 + 1520056^2 .

It is not a de Polignac number, because 2499766534225 - 2³ = 2499766534217 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 7747219 + ... + 8063431.

Almost surely, 2^{2499766534225} is an apocalyptic number.

2499766534225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

2499766534225 is the 1581065-th square number.

2499766534225 is the 790533-rd centered octagonal number.

It is an amenable number.

2499766534225 is a deficient number, since it is larger than the sum of its proper divisors (599953770848).

2499766534225 is an frugal number, since it uses more digits than its factorization.

2499766534225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 632436 (or 316218 counting only the distinct ones).

The product of its digits is 195955200, while the sum is 64.

Multiplying 2499766534225 by its sum of digits (64), we get a square (159985058190400 = 12648520²).

The spelling of 2499766534225 in words is "two trillion, four hundred ninety-nine billion, seven hundred sixty-six million, five hundred thirty-four thousand, two hundred twenty-five".