265142202643 has 4 divisors (see below), whose sum is σ = 265296088408. Its totient is φ = 264988316880.

The previous prime is 265142202641. The next prime is 265142202653. The reversal of 265142202643 is 346202241562.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 346202241562 = 2 ⋅173101120781.

It is a cyclic number.

It is not a de Polignac number, because 265142202643 - 2¹ = 265142202641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (265142202641) 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, 76940298 + ... + 76943743.

It is an arithmetic number, because the mean of its divisors is an integer number (66324022102).

Almost surely, 2^265142202643 is an apocalyptic number.

265142202643 is a deficient number, since it is larger than the sum of its proper divisors (153885765).

265142202643 is a wasteful number, since it uses less digits than its factorization.

265142202643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153885764.

The product of its (nonzero) digits is 138240, while the sum is 37.

The spelling of 265142202643 in words is "two hundred sixty-five billion, one hundred forty-two million, two hundred two thousand, six hundred forty-three".