2609606790225 has 36 divisors (see below), whose sum is σ = 4681720917276. Its totient is φ = 1389519757440.

The previous prime is 2609606790221. The next prime is 2609606790229. The reversal of 2609606790225 is 5220976069062.

It is a happy number.

2609606790225 is a `hidden beast` number, since 2 + 6 + 0 + 9 + 606 + 7 + 9 + 0 + 2 + 25 = 666.

It is an interprime number because it is at equal distance from previous prime (2609606790221) and next prime (2609606790229).

It can be written as a sum of positive squares in 6 ways, for example, as 62160961041 + 2547445829184 = 249321^2 + 1596072^2 .

It is not a de Polignac number, because 2609606790225 - 2² = 2609606790221 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2609606790221) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 9322314 + ... + 9598163.

Almost surely, 2^{2609606790225} is an apocalyptic number.

2609606790225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2609606790225 is a deficient number, since it is larger than the sum of its proper divisors (2072114127051).

2609606790225 is a wasteful number, since it uses less digits than its factorization.

2609606790225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18921106 (or 18921098 counting only the distinct ones).

The product of its (nonzero) digits is 4898880, while the sum is 54.

The spelling of 2609606790225 in words is "two trillion, six hundred nine billion, six hundred six million, seven hundred ninety thousand, two hundred twenty-five".