1123155026665 has 16 divisors (see below), whose sum is σ = 1630934358912. Its totient is φ = 724859714304.

The previous prime is 1123155026629. The next prime is 1123155026671. The reversal of 1123155026665 is 5666205513211.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1123155026665 - 2¹⁷ = 1123154895593 is a prime.

It is a super-2 number, since 2×1123155026665² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 943827159 + ... + 943828348.

It is an arithmetic number, because the mean of its divisors is an integer number (101933397432).

Almost surely, 2^{1123155026665} is an apocalyptic number.

It is an amenable number.

1123155026665 is a deficient number, since it is larger than the sum of its proper divisors (507779332247).

1123155026665 is a wasteful number, since it uses less digits than its factorization.

1123155026665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1887655536.

The product of its (nonzero) digits is 324000, while the sum is 43.

The spelling of 1123155026665 in words is "one trillion, one hundred twenty-three billion, one hundred fifty-five million, twenty-six thousand, six hundred sixty-five".