1155419623808 has 128 divisors (see below), whose sum is σ = 2519736387840. Its totient is φ = 525370982400.

The previous prime is 1155419623807. The next prime is 1155419623819. The reversal of 1155419623808 is 8083269145511.

It is a tau number, because it is divible by the number of its divisors (128).

It is a self number, because there is not a number n which added to its sum of digits gives 1155419623808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1155419623807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44575460 + ... + 44601372.

It is an arithmetic number, because the mean of its divisors is an integer number (19685440530).

Almost surely, 2^{1155419623808} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1155419623808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1259868193920).

1155419623808 is an abundant number, since it is smaller than the sum of its proper divisors (1364316764032).

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

1155419623808 is a wasteful number, since it uses less digits than its factorization.

1155419623808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26636 (or 26624 counting only the distinct ones).

The product of its (nonzero) digits is 2073600, while the sum is 53.

The spelling of 1155419623808 in words is "one trillion, one hundred fifty-five billion, four hundred nineteen million, six hundred twenty-three thousand, eight hundred eight".