1255011417209 has 16 divisors (see below), whose sum is σ = 1390092288000. Its totient is φ = 1123504920720.

The previous prime is 1255011417197. The next prime is 1255011417211. The reversal of 1255011417209 is 9027141105521.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1255011417209 - 2⁴⁰ = 155499789433 is a prime.

It is a super-2 number, since 2×1255011417209² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1255011417229) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1575929 + ... + 2234630.

It is an arithmetic number, because the mean of its divisors is an integer number (86880768000).

Almost surely, 2^{1255011417209} is an apocalyptic number.

It is an amenable number.

1255011417209 is a deficient number, since it is larger than the sum of its proper divisors (135080870791).

1255011417209 is a wasteful number, since it uses less digits than its factorization.

1255011417209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3811028.

The product of its (nonzero) digits is 25200, while the sum is 38.

The spelling of 1255011417209 in words is "one trillion, two hundred fifty-five billion, eleven million, four hundred seventeen thousand, two hundred nine".