1161640501200 has 180 divisors, whose sum is σ = 4062958668288. Its totient is φ = 307331539200.

The previous prime is 1161640501199. The next prime is 1161640501253. The reversal of 1161640501200 is 21050461611.

1161640501200 is a `hidden beast` number, since 1 + 1 + 6 + 1 + 640 + 5 + 0 + 12 + 0 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (180).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 813186 + ... + 1727585.

Almost surely, 2^{1161640501200} is an apocalyptic number.

1161640501200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1161640501200 is an abundant number, since it is smaller than the sum of its proper divisors (2901318167088).

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

1161640501200 is a wasteful number, since it uses less digits than its factorization.

1161640501200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2540922 (or 2540908 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

Adding to 1161640501200 its reverse (21050461611), we get a palindrome (1182690962811).

The spelling of 1161640501200 in words is "one trillion, one hundred sixty-one billion, six hundred forty million, five hundred one thousand, two hundred".