1266525143643 has 16 divisors (see below), whose sum is σ = 1689490004480. Its totient is φ = 843955295904.

The previous prime is 1266525143633. The next prime is 1266525143669. The reversal of 1266525143643 is 3463415256621.

It is not a de Polignac number, because 1266525143643 - 2²⁵ = 1266491589211 is a prime.

It is a super-2 number, since 2×1266525143643² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1266525143592 and 1266525143601.

It is not an unprimeable number, because it can be changed into a prime (1266525143623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 79552638 + ... + 79568556.

It is an arithmetic number, because the mean of its divisors is an integer number (105593125280).

Almost surely, 2^{1266525143643} is an apocalyptic number.

1266525143643 is a deficient number, since it is larger than the sum of its proper divisors (422964860837).

1266525143643 is a wasteful number, since it uses less digits than its factorization.

1266525143643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26658.

The product of its digits is 3110400, while the sum is 48.

The spelling of 1266525143643 in words is "one trillion, two hundred sixty-six billion, five hundred twenty-five million, one hundred forty-three thousand, six hundred forty-three".