1289155258423 has 8 divisors (see below), whose sum is σ = 1292937542000. Its totient is φ = 1285376050368.

The previous prime is 1289155258411. The next prime is 1289155258453. The reversal of 1289155258423 is 3248525519821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1289155258423 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1289155258453) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 72028 + ... + 1607326.

It is an arithmetic number, because the mean of its divisors is an integer number (161617192750).

Almost surely, 2^{1289155258423} is an apocalyptic number.

1289155258423 is a deficient number, since it is larger than the sum of its proper divisors (3782283577).

1289155258423 is a wasteful number, since it uses less digits than its factorization.

1289155258423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1537761.

The product of its digits is 6912000, while the sum is 55.

The spelling of 1289155258423 in words is "one trillion, two hundred eighty-nine billion, one hundred fifty-five million, two hundred fifty-eight thousand, four hundred twenty-three".