265206646055661 has 32 divisors (see below), whose sum is σ = 354198213832320. Its totient is φ = 176510053843200.

The previous prime is 265206646055653. The next prime is 265206646055683. The reversal of 265206646055661 is 166550646602562.

It is not a de Polignac number, because 265206646055661 - 2³ = 265206646055653 is a prime.

It is a super-2 number, since 2×265206646055661² (a number of 30 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 265206646055595 and 265206646055604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (265206646055761) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 43988493595 + ... + 43988499623.

It is an arithmetic number, because the mean of its divisors is an integer number (11068694182260).

Almost surely, 2^{265206646055661} is an apocalyptic number.

It is an amenable number.

265206646055661 is a deficient number, since it is larger than the sum of its proper divisors (88991567776659).

265206646055661 is a wasteful number, since it uses less digits than its factorization.

265206646055661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14797.

The product of its (nonzero) digits is 93312000, while the sum is 60.

The spelling of 265206646055661 in words is "two hundred sixty-five trillion, two hundred six billion, six hundred forty-six million, fifty-five thousand, six hundred sixty-one".