265645650946901 has 16 divisors (see below), whose sum is σ = 269129041027200. Its totient is φ = 262173698189568.

The previous prime is 265645650946783. The next prime is 265645650946909. The reversal of 265645650946901 is 109649056546562.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-265645650946901 is a prime.

It is a super-2 number, since 2×265645650946901² (a number of 30 digits) contains 22 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 (265645650946909) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 130068320 + ... + 132094886.

It is an arithmetic number, because the mean of its divisors is an integer number (16820565064200).

Almost surely, 2^{265645650946901} is an apocalyptic number.

It is an amenable number.

265645650946901 is a deficient number, since it is larger than the sum of its proper divisors (3483390080299).

265645650946901 is a wasteful number, since it uses less digits than its factorization.

265645650946901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2029388.

The product of its (nonzero) digits is 419904000, while the sum is 68.

The spelling of 265645650946901 in words is "two hundred sixty-five trillion, six hundred forty-five billion, six hundred fifty million, nine hundred forty-six thousand, nine hundred one".