1266155188125 has 40 divisors (see below), whose sum is σ = 2109760085664. Its totient is φ = 675226200000.

The previous prime is 1266155188091. The next prime is 1266155188147. The reversal of 1266155188125 is 5218815516621.

It is not a de Polignac number, because 1266155188125 - 2⁶ = 1266155188061 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 32074650 + ... + 32114100.

Almost surely, 2^{1266155188125} is an apocalyptic number.

1266155188125 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1266155188125 is a deficient number, since it is larger than the sum of its proper divisors (843604897539).

1266155188125 is an equidigital number, since it uses as much as digits as its factorization.

1266155188125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56591 (or 56576 counting only the distinct ones).

The product of its digits is 1152000, while the sum is 51.

The spelling of 1266155188125 in words is "one trillion, two hundred sixty-six billion, one hundred fifty-five million, one hundred eighty-eight thousand, one hundred twenty-five".