1165551550500 has 48 divisors (see below), whose sum is σ = 3394086119424. Its totient is φ = 310813746400.

The previous prime is 1165551550489. The next prime is 1165551550507. The reversal of 1165551550500 is 50551555611.

It is not an unprimeable number, because it can be changed into a prime (1165551550507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 388515684 + ... + 388518683.

It is an arithmetic number, because the mean of its divisors is an integer number (70710127488).

Almost surely, 2^{1165551550500} is an apocalyptic number.

1165551550500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1165551550500 is an abundant number, since it is smaller than the sum of its proper divisors (2228534568924).

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

1165551550500 is a wasteful number, since it uses less digits than its factorization.

1165551550500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 777034389 (or 777034377 counting only the distinct ones).

The product of its (nonzero) digits is 93750, while the sum is 39.

The spelling of 1165551550500 in words is "one trillion, one hundred sixty-five billion, five hundred fifty-one million, five hundred fifty thousand, five hundred".