1288961591523 has 8 divisors (see below), whose sum is σ = 1742821307136. Its totient is φ = 847204801800.

The previous prime is 1288961591447. The next prime is 1288961591563. The reversal of 1288961591523 is 3251951698821.

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

It is not a de Polignac number, because 1288961591523 - 2²² = 1288957397219 is a prime.

It is a super-2 number, since 2×1288961591523² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1288961591563) 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, 3025731223 + ... + 3025731648.

It is an arithmetic number, because the mean of its divisors is an integer number (217852663392).

Almost surely, 2^{1288961591523} is an apocalyptic number.

1288961591523 is a deficient number, since it is larger than the sum of its proper divisors (453859715613).

1288961591523 is an equidigital number, since it uses as much as digits as its factorization.

1288961591523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6051462945.

The product of its digits is 9331200, while the sum is 60.

The spelling of 1288961591523 in words is "one trillion, two hundred eighty-eight billion, nine hundred sixty-one million, five hundred ninety-one thousand, five hundred twenty-three".