1104609609561 has 4 divisors (see below), whose sum is σ = 1472812812752. Its totient is φ = 736406406372.

The previous prime is 1104609609557. The next prime is 1104609609613. The reversal of 1104609609561 is 1659069064011.

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 not a de Polignac number, because 1104609609561 - 2² = 1104609609557 is a prime.

It is a super-2 number, since 2×1104609609561² (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 1104609609561.

It is not an unprimeable number, because it can be changed into a prime (1104709609561) 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, 184101601591 + ... + 184101601596.

It is an arithmetic number, because the mean of its divisors is an integer number (368203203188).

Almost surely, 2^{1104609609561} is an apocalyptic number.

It is an amenable number.

1104609609561 is a deficient number, since it is larger than the sum of its proper divisors (368203203191).

1104609609561 is an equidigital number, since it uses as much as digits as its factorization.

1104609609561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 368203203190.

The product of its (nonzero) digits is 349920, while the sum is 48.

The spelling of 1104609609561 in words is "one trillion, one hundred four billion, six hundred nine million, six hundred nine thousand, five hundred sixty-one".