1161326520 has 48 divisors (see below), whose sum is σ = 3774312360. Its totient is φ = 309686976.

The previous prime is 1161326519. The next prime is 1161326527. The reversal of 1161326520 is 256231611.

1161326520 is a `hidden beast` number, since 1 + 1 + 6 + 1 + 3 + 2 + 652 + 0 = 666.

1161326520 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1161326527) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1612594 + ... + 1613313.

Almost surely, 2^1161326520 is an apocalyptic number.

1161326520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1161326520 is an abundant number, since it is smaller than the sum of its proper divisors (2612985840).

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

1161326520 is a wasteful number, since it uses less digits than its factorization.

1161326520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3225924 (or 3225917 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 1161326520 is about 34078.2411517966. The cubic root of 1161326520 is about 1051.1179385563.

The spelling of 1161326520 in words is "one billion, one hundred sixty-one million, three hundred twenty-six thousand, five hundred twenty".