1156511632 has 40 divisors (see below), whose sum is σ = 2377394712. Its totient is φ = 543129600.

The previous prime is 1156511621. The next prime is 1156511633. The reversal of 1156511632 is 2361156511.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 146797456 + 1009714176 = 12116^2 + 31776^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1156511594 and 1156511603.

It is not an unprimeable number, because it can be changed into a prime (1156511633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 137632 + ... + 145792.

Almost surely, 2^1156511632 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 1156511632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1188697356).

1156511632 is an abundant number, since it is smaller than the sum of its proper divisors (1220883080).

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

1156511632 is a wasteful number, since it uses less digits than its factorization.

1156511632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8707 (or 8701 counting only the distinct ones).

The product of its digits is 5400, while the sum is 31.

The square root of 1156511632 is about 34007.5231676757. The cubic root of 1156511632 is about 1049.6632728269.

The spelling of 1156511632 in words is "one billion, one hundred fifty-six million, five hundred eleven thousand, six hundred thirty-two".