1155011515500 has 48 divisors (see below), whose sum is σ = 3363393537504. Its totient is φ = 308003070400.

The previous prime is 1155011515499. The next prime is 1155011515507. The reversal of 1155011515500 is 55151105511.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (1155011515507) 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 15 ways as a sum of consecutive naturals, for example, 385002339 + ... + 385005338.

It is an arithmetic number, because the mean of its divisors is an integer number (70070698698).

Almost surely, 2^{1155011515500} is an apocalyptic number.

1155011515500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1155011515500 is an abundant number, since it is smaller than the sum of its proper divisors (2208382022004).

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

1155011515500 is a wasteful number, since it uses less digits than its factorization.

1155011515500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 770007699 (or 770007687 counting only the distinct ones).

The product of its (nonzero) digits is 3125, while the sum is 30.

The spelling of 1155011515500 in words is "one trillion, one hundred fifty-five billion, eleven million, five hundred fifteen thousand, five hundred".