1155545513 has 8 divisors (see below), whose sum is σ = 1196113800. Its totient is φ = 1115025408.

The previous prime is 1155545453. The next prime is 1155545527. The reversal of 1155545513 is 3155455511.

It can be written as a sum of positive squares in 4 ways, for example, as 107599129 + 1047946384 = 10373^2 + 32372^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1155545513 - 2⁸ = 1155545257 is a prime.

It is a super-2 number, since 2×1155545513² = 2670570865228866338, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1155545533) 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 7 ways as a sum of consecutive naturals, for example, 40745 + ... + 63017.

It is an arithmetic number, because the mean of its divisors is an integer number (149514225).

Almost surely, 2^1155545513 is an apocalyptic number.

It is an amenable number.

1155545513 is a deficient number, since it is larger than the sum of its proper divisors (40568287).

1155545513 is a wasteful number, since it uses less digits than its factorization.

1155545513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24091.

The product of its digits is 37500, while the sum is 35.

The square root of 1155545513 is about 33993.3157105923. The cubic root of 1155545513 is about 1049.3709044902.

The spelling of 1155545513 in words is "one billion, one hundred fifty-five million, five hundred forty-five thousand, five hundred thirteen".