2265340621261 has 4 divisors (see below), whose sum is σ = 2265388574752. Its totient is φ = 2265292667772.

The previous prime is 2265340621259. The next prime is 2265340621267. The reversal of 2265340621261 is 1621260435622.

It is a happy number.

2265340621261 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 2265340621261 - 2¹ = 2265340621259 is a prime.

It is a super-3 number, since 3×2265340621261³ (a number of 38 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2265340621267) 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, 23905815 + ... + 24000388.

It is an arithmetic number, because the mean of its divisors is an integer number (566347143688).

Almost surely, 2^{2265340621261} is an apocalyptic number.

It is an amenable number.

2265340621261 is a deficient number, since it is larger than the sum of its proper divisors (47953491).

2265340621261 is an equidigital number, since it uses as much as digits as its factorization.

2265340621261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47953490.

The product of its (nonzero) digits is 207360, while the sum is 40.

It can be divided in two parts, 2265340 and 621261, that added together give a square (2886601 = 1699²).

The spelling of 2265340621261 in words is "two trillion, two hundred sixty-five billion, three hundred forty million, six hundred twenty-one thousand, two hundred sixty-one".