1125556812566 has 16 divisors (see below), whose sum is σ = 1688998272288. Its totient is φ = 562557441600.

The previous prime is 1125556812559. The next prime is 1125556812571. The reversal of 1125556812566 is 6652186555211.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 90611036 + ... + 90623456.

It is an arithmetic number, because the mean of its divisors is an integer number (105562392018).

Almost surely, 2^{1125556812566} is an apocalyptic number.

1125556812566 is a deficient number, since it is larger than the sum of its proper divisors (563441459722).

1125556812566 is a wasteful number, since it uses less digits than its factorization.

1125556812566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26567.

The product of its digits is 4320000, while the sum is 53.

The spelling of 1125556812566 in words is "one trillion, one hundred twenty-five billion, five hundred fifty-six million, eight hundred twelve thousand, five hundred sixty-six".