2661559453 has 4 divisors (see below), whose sum is σ = 3041782240. Its totient is φ = 2281336668.

The previous prime is 2661559451. The next prime is 2661559489. The reversal of 2661559453 is 3549551662.

2661559453 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, and also an emirpimes, since its reverse is a distinct semiprime: 3549551662 = 2 ⋅1774775831.

It is a cyclic number.

It is not a de Polignac number, because 2661559453 - 2¹ = 2661559451 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2661559451) 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, 190111383 + ... + 190111396.

It is an arithmetic number, because the mean of its divisors is an integer number (760445560).

Almost surely, 2^2661559453 is an apocalyptic number.

It is an amenable number.

2661559453 is a deficient number, since it is larger than the sum of its proper divisors (380222787).

2661559453 is an equidigital number, since it uses as much as digits as its factorization.

2661559453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 380222786.

The product of its digits is 972000, while the sum is 46.

The square root of 2661559453 is about 51590.3038661336. The cubic root of 2661559453 is about 1385.8366968870.

It can be divided in two parts, 26615 and 59453, that added together give a palindrome (86068).

The spelling of 2661559453 in words is "two billion, six hundred sixty-one million, five hundred fifty-nine thousand, four hundred fifty-three".