145544409 has 6 divisors (see below), whose sum is σ = 210230826. Its totient is φ = 97029600.

The previous prime is 145544369. The next prime is 145544419. The reversal of 145544409 is 904445541.

145544409 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 102576384 + 42968025 = 10128^2 + 6555^2 .

It is not a de Polignac number, because 145544409 - 2¹² = 145540313 is a prime.

It is a super-3 number, since 3×145544409³ (a number of 25 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (145544419) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8085792 + ... + 8085809.

It is an arithmetic number, because the mean of its divisors is an integer number (35038471).

Almost surely, 2^145544409 is an apocalyptic number.

It is an amenable number.

145544409 is a deficient number, since it is larger than the sum of its proper divisors (64686417).

145544409 is a wasteful number, since it uses less digits than its factorization.

145544409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16171607 (or 16171604 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 36.

The square root of 145544409 is about 12064.1787536492. The cubic root of 145544409 is about 526.0154604698.

The spelling of 145544409 in words is "one hundred forty-five million, five hundred forty-four thousand, four hundred nine".