1056665623123 has 16 divisors (see below), whose sum is σ = 1156968916992. Its totient is φ = 957070296000.

The previous prime is 1056665623087. The next prime is 1056665623129. The reversal of 1056665623123 is 3213265666501.

It is a cyclic number.

It is not a de Polignac number, because 1056665623123 - 2¹³ = 1056665614931 is a prime.

It is a super-2 number, since 2×1056665623123² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1056665623129) 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, 34947190 + ... + 34977412.

It is an arithmetic number, because the mean of its divisors is an integer number (72310557312).

Almost surely, 2^{1056665623123} is an apocalyptic number.

1056665623123 is a deficient number, since it is larger than the sum of its proper divisors (100303293869).

1056665623123 is a wasteful number, since it uses less digits than its factorization.

1056665623123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41826.

The product of its (nonzero) digits is 1166400, while the sum is 46.

The spelling of 1056665623123 in words is "one trillion, fifty-six billion, six hundred sixty-five million, six hundred twenty-three thousand, one hundred twenty-three".