2399602374225 has 81 divisors (see below), whose sum is σ = 5000000241873. Its totient is φ = 1096886730240.

The previous prime is 2399602374217. The next prime is 2399602374227. The reversal of 2399602374225 is 5224732069932.

The square root of 2399602374225 is 1549065.

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

2399602374225 is a `hidden beast` number, since 2 + 3 + 9 + 9 + 602 + 3 + 7 + 4 + 2 + 25 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 54404163009 + 2345198211216 = 233247^2 + 1531404^2 .

It is not a de Polignac number, because 2399602374225 - 2³ = 2399602374217 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2399602374227) by changing a digit.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 162644449 + ... + 162659201.

Almost surely, 2^{2399602374225} is an apocalyptic number.

2399602374225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

2399602374225 is the 1549065-th square number.

2399602374225 is the 774533-rd centered octagonal number.

It is an amenable number.

2399602374225 is an abundant number, since it is smaller than the sum of its proper divisors (2600397867648).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2399602374225 is an frugal number, since it uses more digits than its factorization.

2399602374225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29536 (or 14768 counting only the distinct ones).

The product of its (nonzero) digits is 9797760, while the sum is 54.

The spelling of 2399602374225 in words is "two trillion, three hundred ninety-nine billion, six hundred two million, three hundred seventy-four thousand, two hundred twenty-five".