2630561521 has 27 divisors (see below), whose sum is σ = 3258191307. Its totient is φ = 2117209920.

The previous prime is 2630561477. The next prime is 2630561537. The reversal of 2630561521 is 1251650362.

The square root of 2630561521 is 51289.

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

It can be written as a sum of positive squares in only one way, i.e., 2048015025 + 582546496 = 45255^2 + 24136^2 .

It is not a de Polignac number, because 2630561521 - 2⁹ = 2630561009 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2630567521) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 6103176 + ... + 6103606.

Almost surely, 2^2630561521 is an apocalyptic number.

2630561521 is the 51289-th square number.

2630561521 is the 25645-th centered octagonal number.

It is an amenable number.

2630561521 is a deficient number, since it is larger than the sum of its proper divisors (627629786).

2630561521 is an frugal number, since it uses more digits than its factorization.

2630561521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 910 (or 455 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 31.

The cubic root of 2630561521 is about 1380.4356114475.

The spelling of 2630561521 in words is "two billion, six hundred thirty million, five hundred sixty-one thousand, five hundred twenty-one".