2265031515661 has 4 divisors (see below), whose sum is σ = 2317706667232. Its totient is φ = 2212356364092.

The previous prime is 2265031515587. The next prime is 2265031515683. The reversal of 2265031515661 is 1665151305622.

It is a happy number.

2265031515661 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.

It is a cyclic number.

It is not a de Polignac number, because 2265031515661 - 2⁷ = 2265031515533 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43), and also a Moran number because the ratio is a prime number: 52675151527 = 2265031515661 / (2 + 2 + 6 + 5 + 0 + 3 + 1 + 5 + 1 + 5 + 6 + 6 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2265031518661) 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, 26337575721 + ... + 26337575806.

It is an arithmetic number, because the mean of its divisors is an integer number (579426666808).

Almost surely, 2^{2265031515661} is an apocalyptic number.

It is an amenable number.

2265031515661 is a deficient number, since it is larger than the sum of its proper divisors (52675151571).

2265031515661 is an equidigital number, since it uses as much as digits as its factorization.

2265031515661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52675151570.

The product of its (nonzero) digits is 324000, while the sum is 43.

The spelling of 2265031515661 in words is "two trillion, two hundred sixty-five billion, thirty-one million, five hundred fifteen thousand, six hundred sixty-one".