261440036466341 has 4 divisors (see below), whose sum is σ = 262193465966592. Its totient is φ = 260686606966092.

The previous prime is 261440036466307. The next prime is 261440036466457. The reversal of 261440036466341 is 143664630044162.

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 a de Polignac number, because none of the positive numbers 2^k-261440036466341 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 261440036466341.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261440036466241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 376714749605 + ... + 376714750298.

It is an arithmetic number, because the mean of its divisors is an integer number (65548366491648).

Almost surely, 2^{261440036466341} is an apocalyptic number.

It is an amenable number.

261440036466341 is a deficient number, since it is larger than the sum of its proper divisors (753429500251).

261440036466341 is an equidigital number, since it uses as much as digits as its factorization.

261440036466341 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 753429500250.

The product of its (nonzero) digits is 5971968, while the sum is 50.

The spelling of 261440036466341 in words is "two hundred sixty-one trillion, four hundred forty billion, thirty-six million, four hundred sixty-six thousand, three hundred forty-one".