1105551561556 has 48 divisors (see below), whose sum is σ = 2135334700800. Its totient is φ = 497725667712.

The previous prime is 1105551561523. The next prime is 1105551561559. The reversal of 1105551561556 is 6551651555011.

It is a happy number.

It is a super-2 number, since 2×1105551561556² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1105551561559) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1280251 + ... + 1962178.

It is an arithmetic number, because the mean of its divisors is an integer number (44486139600).

Almost surely, 2^{1105551561556} is an apocalyptic number.

It is an amenable number.

1105551561556 is a deficient number, since it is larger than the sum of its proper divisors (1029783139244).

1105551561556 is a wasteful number, since it uses less digits than its factorization.

1105551561556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3242608 (or 3242606 counting only the distinct ones).

The product of its (nonzero) digits is 562500, while the sum is 46.

The spelling of 1105551561556 in words is "one trillion, one hundred five billion, five hundred fifty-one million, five hundred sixty-one thousand, five hundred fifty-six".