1011156655566 has 16 divisors (see below), whose sum is σ = 2022377122944. Its totient is φ = 337041583224.

The previous prime is 1011156655547. The next prime is 1011156655577. The reversal of 1011156655566 is 6655566511101.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2451586 + ... + 2834181.

It is an arithmetic number, because the mean of its divisors is an integer number (126398570184).

Almost surely, 2^{1011156655566} is an apocalyptic number.

1011156655566 is an abundant number, since it is smaller than the sum of its proper divisors (1011220467378).

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

1011156655566 is a wasteful number, since it uses less digits than its factorization.

1011156655566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5317655.

The product of its (nonzero) digits is 810000, while the sum is 48.

The spelling of 1011156655566 in words is "one trillion, eleven billion, one hundred fifty-six million, six hundred fifty-five thousand, five hundred sixty-six".