1217604104641 has 4 divisors (see below), whose sum is σ = 1217825211312. Its totient is φ = 1217382997972.

The previous prime is 1217604104623. The next prime is 1217604104693. The reversal of 1217604104641 is 1464014067121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1217604104641 - 2¹⁷ = 1217603973569 is a prime.

It is a super-2 number, since 2×1217604104641² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1217604104641.

It is not an unprimeable number, because it can be changed into a prime (1217604104611) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 110545075 + ... + 110556088.

It is an arithmetic number, because the mean of its divisors is an integer number (304456302828).

Almost surely, 2^{1217604104641} is an apocalyptic number.

It is an amenable number.

1217604104641 is a deficient number, since it is larger than the sum of its proper divisors (221106671).

1217604104641 is an equidigital number, since it uses as much as digits as its factorization.

1217604104641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221106670.

The product of its (nonzero) digits is 32256, while the sum is 37.

The spelling of 1217604104641 in words is "one trillion, two hundred seventeen billion, six hundred four million, one hundred four thousand, six hundred forty-one".