1256923468889 has 16 divisors (see below), whose sum is σ = 1372402590336. Its totient is φ = 1141646976000.

The previous prime is 1256923468859. The next prime is 1256923468949. The reversal of 1256923468889 is 9888643296521.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1256923468889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1256923468859) 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, 95744444 + ... + 95757570.

It is an arithmetic number, because the mean of its divisors is an integer number (85775161896).

Almost surely, 2^{1256923468889} is an apocalyptic number.

It is an amenable number.

1256923468889 is a deficient number, since it is larger than the sum of its proper divisors (115479121447).

1256923468889 is a wasteful number, since it uses less digits than its factorization.

1256923468889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20176.

The product of its digits is 358318080, while the sum is 71.

The spelling of 1256923468889 in words is "one trillion, two hundred fifty-six billion, nine hundred twenty-three million, four hundred sixty-eight thousand, eight hundred eighty-nine".