1101563815990 has 96 divisors (see below), whose sum is σ = 2202645856320. Its totient is φ = 396314096640.

The previous prime is 1101563815981. The next prime is 1101563816029. The reversal of 1101563815990 is 995183651011.

It is a congruent number.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 160644642 + ... + 160651498.

It is an arithmetic number, because the mean of its divisors is an integer number (22944227670).

Almost surely, 2^{1101563815990} is an apocalyptic number.

1101563815990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1101563815990 is a deficient number, since it is larger than the sum of its proper divisors (1101082040330).

1101563815990 is a wasteful number, since it uses less digits than its factorization.

1101563815990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8278 (or 8267 counting only the distinct ones).

The product of its (nonzero) digits is 291600, while the sum is 49.

The spelling of 1101563815990 in words is "one trillion, one hundred one billion, five hundred sixty-three million, eight hundred fifteen thousand, nine hundred ninety".