2605661522 has 4 divisors (see below), whose sum is σ = 3908492286. Its totient is φ = 1302830760.

The previous prime is 2605661521. The next prime is 2605661533. The reversal of 2605661522 is 2251665062.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 2265664801 + 339996721 = 47599^2 + 18439^2 .

It is not an unprimeable number, because it can be changed into a prime (2605661521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 651415379 + ... + 651415382.

Almost surely, 2^2605661522 is an apocalyptic number.

2605661522 is a deficient number, since it is larger than the sum of its proper divisors (1302830764).

2605661522 is a wasteful number, since it uses less digits than its factorization.

2605661522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1302830763.

The product of its (nonzero) digits is 43200, while the sum is 35.

The square root of 2605661522 is about 51045.6807379430. The cubic root of 2605661522 is about 1376.0662182083.

It can be divided in two parts, 26056 and 61522, that added together give a palindrome (87578).

The spelling of 2605661522 in words is "two billion, six hundred five million, six hundred sixty-one thousand, five hundred twenty-two".