391061227265 has 16 divisors (see below), whose sum is σ = 490400068608. Its totient is φ = 298804773696.

The previous prime is 391061227261. The next prime is 391061227279. The reversal of 391061227265 is 562722160193.

It is a cyclic number.

It is not a de Polignac number, because 391061227265 - 2² = 391061227261 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (391061227261) 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, 2433617 + ... + 2589326.

It is an arithmetic number, because the mean of its divisors is an integer number (30650004288).

Almost surely, 2^391061227265 is an apocalyptic number.

It is an amenable number.

391061227265 is a deficient number, since it is larger than the sum of its proper divisors (99338841343).

391061227265 is a wasteful number, since it uses less digits than its factorization.

391061227265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5023648.

The product of its (nonzero) digits is 272160, while the sum is 44.

The spelling of 391061227265 in words is "three hundred ninety-one billion, sixty-one million, two hundred twenty-seven thousand, two hundred sixty-five".