1155056556500 has 96 divisors (see below), whose sum is σ = 3145114103040. Its totient is φ = 360017616000.

The previous prime is 1155056556497. The next prime is 1155056556503. The reversal of 1155056556500 is 56556505511.

It is an interprime number because it is at equal distance from previous prime (1155056556497) and next prime (1155056556503).

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1155056556503) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14962235 + ... + 15039234.

It is an arithmetic number, because the mean of its divisors is an integer number (32761605240).

Almost surely, 2^{1155056556500} is an apocalyptic number.

1155056556500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1155056556500 is an abundant number, since it is smaller than the sum of its proper divisors (1990057546540).

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

1155056556500 is a wasteful number, since it uses less digits than its factorization.

1155056556500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30001506 (or 30001494 counting only the distinct ones).

The product of its (nonzero) digits is 562500, while the sum is 44.

The spelling of 1155056556500 in words is "one trillion, one hundred fifty-five billion, fifty-six million, five hundred fifty-six thousand, five hundred".