1101558556540 has 48 divisors (see below), whose sum is σ = 2491341285888. Its totient is φ = 406709028864.

The previous prime is 1101558556477. The next prime is 1101558556543. The reversal of 1101558556540 is 456558551011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1101558556543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5738149 + ... + 5927011.

It is an arithmetic number, because the mean of its divisors is an integer number (51902943456).

Almost surely, 2^{1101558556540} is an apocalyptic number.

1101558556540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1101558556540 is an abundant number, since it is smaller than the sum of its proper divisors (1389782729348).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1101558556540 is a wasteful number, since it uses less digits than its factorization.

1101558556540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211318 (or 211316 counting only the distinct ones).

The product of its (nonzero) digits is 600000, while the sum is 46.

The spelling of 1101558556540 in words is "one trillion, one hundred one billion, five hundred fifty-eight million, five hundred fifty-six thousand, five hundred forty".