261646211151343 has 4 divisors (see below), whose sum is σ = 261786054130848. Its totient is φ = 261506368171840.

The previous prime is 261646211151319. The next prime is 261646211151373. The reversal of 261646211151343 is 343151112646162.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 261646211151343 - 2¹³ = 261646211143151 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 261646211151293 and 261646211151302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261646211151313) 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, 69921486946 + ... + 69921490687.

It is an arithmetic number, because the mean of its divisors is an integer number (65446513532712).

Almost surely, 2^{261646211151343} is an apocalyptic number.

261646211151343 is a deficient number, since it is larger than the sum of its proper divisors (139842979505).

261646211151343 is a wasteful number, since it uses less digits than its factorization.

261646211151343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139842979504.

The product of its digits is 622080, while the sum is 46.

The spelling of 261646211151343 in words is "two hundred sixty-one trillion, six hundred forty-six billion, two hundred eleven million, one hundred fifty-one thousand, three hundred forty-three".