2528360661 has 4 divisors (see below), whose sum is σ = 3371147552. Its totient is φ = 1685573772.

The previous prime is 2528360641. The next prime is 2528360669. The reversal of 2528360661 is 1660638252.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 2528360661 - 2¹³ = 2528352469 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2528360669) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 421393441 + ... + 421393446.

It is an arithmetic number, because the mean of its divisors is an integer number (842786888).

Almost surely, 2^2528360661 is an apocalyptic number.

It is an amenable number.

2528360661 is a deficient number, since it is larger than the sum of its proper divisors (842786891).

2528360661 is an equidigital number, since it uses as much as digits as its factorization.

2528360661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 842786890.

The product of its (nonzero) digits is 103680, while the sum is 39.

The square root of 2528360661 is about 50282.8068130648. The cubic root of 2528360661 is about 1362.3217012821.

The spelling of 2528360661 in words is "two billion, five hundred twenty-eight million, three hundred sixty thousand, six hundred sixty-one".