1153981687326 has 64 divisors (see below), whose sum is σ = 2548261029888. Its totient is φ = 346164092928.

The previous prime is 1153981687307. The next prime is 1153981687357. The reversal of 1153981687326 is 6237861893511.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1153981687326.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 329751 + ... + 1554573.

It is an arithmetic number, because the mean of its divisors is an integer number (39816578592).

Almost surely, 2^{1153981687326} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1153981687326, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1274130514944).

1153981687326 is an abundant number, since it is smaller than the sum of its proper divisors (1394279342562).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1153981687326 is a wasteful number, since it uses less digits than its factorization.

1153981687326 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1225145.

The product of its digits is 13063680, while the sum is 60.

The spelling of 1153981687326 in words is "one trillion, one hundred fifty-three billion, nine hundred eighty-one million, six hundred eighty-seven thousand, three hundred twenty-six".