1145553155 has 4 divisors (see below), whose sum is σ = 1374663792. Its totient is φ = 916442520.

The previous prime is 1145553151. The next prime is 1145553173. The reversal of 1145553155 is 5513555411.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1145553155 - 2² = 1145553151 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1145553151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 114555311 + ... + 114555320.

It is an arithmetic number, because the mean of its divisors is an integer number (343665948).

Almost surely, 2^1145553155 is an apocalyptic number.

1145553155 is a deficient number, since it is larger than the sum of its proper divisors (229110637).

1145553155 is an equidigital number, since it uses as much as digits as its factorization.

1145553155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 229110636.

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

The square root of 1145553155 is about 33846.0212580445. The cubic root of 1145553155 is about 1046.3373992450.

The spelling of 1145553155 in words is "one billion, one hundred forty-five million, five hundred fifty-three thousand, one hundred fifty-five".