1136561000 has 128 divisors (see below), whose sum is σ = 2869776000. Its totient is φ = 419904000.

The previous prime is 1136560963. The next prime is 1136561009. The reversal of 1136561000 is 1656311.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1136561009) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 778271 + ... + 779729.

It is an arithmetic number, because the mean of its divisors is an integer number (22420125).

Almost surely, 2^1136561000 is an apocalyptic number.

1136561000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1136561000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1434888000).

1136561000 is an abundant number, since it is smaller than the sum of its proper divisors (1733215000).

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

1136561000 is a wasteful number, since it uses less digits than its factorization.

1136561000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1540 (or 1526 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 23.

The square root of 1136561000 is about 33712.9203718693. The cubic root of 1136561000 is about 1043.5924212610.

The spelling of 1136561000 in words is "one billion, one hundred thirty-six million, five hundred sixty-one thousand".