221411706545765 has 32 divisors (see below), whose sum is σ = 279949940085120. Its totient is φ = 167643587913984.

The previous prime is 221411706545759. The next prime is 221411706545831. The reversal of 221411706545765 is 567545607114122.

It is a cyclic number.

It is not a de Polignac number, because 221411706545765 - 2²⁶ = 221411639436901 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 221411706545765.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2174980847 + ... + 2175082643.

It is an arithmetic number, because the mean of its divisors is an integer number (8748435627660).

Almost surely, 2^{221411706545765} is an apocalyptic number.

It is an amenable number.

221411706545765 is a deficient number, since it is larger than the sum of its proper divisors (58538233539355).

221411706545765 is a wasteful number, since it uses less digits than its factorization.

221411706545765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123861.

The product of its (nonzero) digits is 14112000, while the sum is 56.

The spelling of 221411706545765 in words is "two hundred twenty-one trillion, four hundred eleven billion, seven hundred six million, five hundred forty-five thousand, seven hundred sixty-five".