611221220265 has 16 divisors (see below), whose sum is σ = 979465488768. Its totient is φ = 325480805376.

The previous prime is 611221220227. The next prime is 611221220273. The reversal of 611221220265 is 562022122116.

It is not a de Polignac number, because 611221220265 - 2¹⁰ = 611221219241 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31480312 + ... + 31499721.

It is an arithmetic number, because the mean of its divisors is an integer number (61216593048).

Almost surely, 2^611221220265 is an apocalyptic number.

It is an amenable number.

611221220265 is a deficient number, since it is larger than the sum of its proper divisors (368244268503).

611221220265 is a wasteful number, since it uses less digits than its factorization.

611221220265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62980688.

The product of its (nonzero) digits is 5760, while the sum is 30.

The spelling of 611221220265 in words is "six hundred eleven billion, two hundred twenty-one million, two hundred twenty thousand, two hundred sixty-five".