1159558638 has 192 divisors, whose sum is σ = 2992308480. Its totient is φ = 297561600.

The previous prime is 1159558633. The next prime is 1159558669. The reversal of 1159558638 is 8368559511.

It is a happy number.

Its product of digits (1296000) is a multiple of the sum of its prime divisors (216).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1159558633) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 13970545 + ... + 13970627.

It is an arithmetic number, because the mean of its divisors is an integer number (15584940).

Almost surely, 2^1159558638 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1159558638, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1496154240).

1159558638 is an abundant number, since it is smaller than the sum of its proper divisors (1832749842).

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

1159558638 is a wasteful number, since it uses less digits than its factorization.

1159558638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 223 (or 216 counting only the distinct ones).

The product of its digits is 1296000, while the sum is 51.

The square root of 1159558638 is about 34052.2926981430. The cubic root of 1159558638 is about 1050.5842970162.

The spelling of 1159558638 in words is "one billion, one hundred fifty-nine million, five hundred fifty-eight thousand, six hundred thirty-eight".