1161541600 has 72 divisors (see below), whose sum is σ = 2846255328. Its totient is φ = 462873600.

The previous prime is 1161541583. The next prime is 1161541637. The reversal of 1161541600 is 61451611.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 222217 + ... + 227383.

It is an arithmetic number, because the mean of its divisors is an integer number (39531324).

Almost surely, 2^1161541600 is an apocalyptic number.

1161541600 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 1161541600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1423127664).

1161541600 is an abundant number, since it is smaller than the sum of its proper divisors (1684713728).

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

1161541600 is a wasteful number, since it uses less digits than its factorization.

1161541600 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5468 (or 5455 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 25.

The square root of 1161541600 is about 34081.3966849952. The cubic root of 1161541600 is about 1051.1828242674.

The spelling of 1161541600 in words is "one billion, one hundred sixty-one million, five hundred forty-one thousand, six hundred".