145555569 has 32 divisors (see below), whose sum is σ = 229847040. Its totient is φ = 90824976.

The previous prime is 145555511. The next prime is 145555591. The reversal of 145555569 is 965555541.

145555569 is a `hidden beast` number, since 1 + 45 + 55 + 556 + 9 = 666.

It is not a de Polignac number, because 145555569 - 2⁷ = 145555441 is a prime.

It is a super-2 number, since 2×145555569² = 42372847333827522, which contains 22 as substring.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (145555369) by changing a digit.

It is an upside-down number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 26694 + ... + 31680.

It is an arithmetic number, because the mean of its divisors is an integer number (7182720).

Almost surely, 2^145555569 is an apocalyptic number.

It is an amenable number.

145555569 is a deficient number, since it is larger than the sum of its proper divisors (84291471).

145555569 is a wasteful number, since it uses less digits than its factorization.

145555569 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5066 (or 5060 counting only the distinct ones).

The product of its digits is 675000, while the sum is 45.

The square root of 145555569 is about 12064.6412710863. The cubic root of 145555569 is about 526.0289046654.

The spelling of 145555569 in words is "one hundred forty-five million, five hundred fifty-five thousand, five hundred sixty-nine".