265511216406 has 16 divisors (see below), whose sum is σ = 532981928448. Its totient is φ = 88177156200.

The previous prime is 265511216401. The next prime is 265511216441. The reversal of 265511216406 is 604612115562.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (265511216401) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81643890 + ... + 81647141.

It is an arithmetic number, because the mean of its divisors is an integer number (33311370528).

Almost surely, 2^265511216406 is an apocalyptic number.

265511216406 is an abundant number, since it is smaller than the sum of its proper divisors (267470712042).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

265511216406 is a wasteful number, since it uses less digits than its factorization.

265511216406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163291307.

The product of its (nonzero) digits is 86400, while the sum is 39.

The spelling of 265511216406 in words is "two hundred sixty-five billion, five hundred eleven million, two hundred sixteen thousand, four hundred six".