1145544155 has 8 divisors (see below), whose sum is σ = 1571032032. Its totient is φ = 785515968.

The previous prime is 1145544149. The next prime is 1145544163. The reversal of 1145544155 is 5514455411.

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

It is a cyclic number.

It is not a de Polignac number, because 1145544155 - 2⁴ = 1145544139 is a prime.

It is a super-2 number, since 2×1145544155² = 2624542822109328050, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (35), and also a Moran number because the ratio is a prime number: 32729833 = 1145544155 / (1 + 1 + 4 + 5 + 5 + 4 + 4 + 1 + 5 + 5).

It is a Duffinian number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 16364882 + ... + 16364951.

It is an arithmetic number, because the mean of its divisors is an integer number (196379004).

Almost surely, 2^1145544155 is an apocalyptic number.

1145544155 is a deficient number, since it is larger than the sum of its proper divisors (425487877).

1145544155 is an equidigital number, since it uses as much as digits as its factorization.

1145544155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32729845.

The product of its digits is 40000, while the sum is 35.

The square root of 1145544155 is about 33845.8883027171. Note that the first 3 decimals coincide. The cubic root of 1145544155 is about 1046.3346590663.

Adding to 1145544155 its reverse (5514455411), we get a palindrome (6659999566).

The spelling of 1145544155 in words is "one billion, one hundred forty-five million, five hundred forty-four thousand, one hundred fifty-five".