1155551042500 has 30 divisors (see below), whose sum is σ = 2526959025206. Its totient is φ = 462220416000.

The previous prime is 1155551042491. The next prime is 1155551042507. The reversal of 1155551042500 is 52401555511.

It can be written as a sum of positive squares in 5 ways, for example, as 735968388996 + 419582653504 = 857886^2 + 647752^2 .

It is not an unprimeable number, because it can be changed into a prime (1155551042507) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 231107709 + ... + 231112708.

Almost surely, 2^{1155551042500} is an apocalyptic number.

1155551042500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1155551042500 is an abundant number, since it is smaller than the sum of its proper divisors (1371407982706).

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

1155551042500 is an equidigital number, since it uses as much as digits as its factorization.

1155551042500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 462220441 (or 462220424 counting only the distinct ones).

The product of its (nonzero) digits is 25000, while the sum is 34.

The spelling of 1155551042500 in words is "one trillion, one hundred fifty-five billion, five hundred fifty-one million, forty-two thousand, five hundred".