145509845 has 24 divisors (see below), whose sum is σ = 197323776. Its totient is φ = 102767808.

The previous prime is 145509803. The next prime is 145509853. The reversal of 145509845 is 548905541.

145509845 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 145509845 - 2¹⁸ = 145247701 is a prime.

It is a super-2 number, since 2×145509845² = 42346229983848050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15692 + ... + 23178.

It is an arithmetic number, because the mean of its divisors is an integer number (8221824).

Almost surely, 2^145509845 is an apocalyptic number.

It is an amenable number.

145509845 is a deficient number, since it is larger than the sum of its proper divisors (51813931).

145509845 is a wasteful number, since it uses less digits than its factorization.

145509845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7541 (or 7528 counting only the distinct ones).

The product of its (nonzero) digits is 144000, while the sum is 41.

The square root of 145509845 is about 12062.7461632913. The cubic root of 145509845 is about 525.9738176523.

The spelling of 145509845 in words is "one hundred forty-five million, five hundred nine thousand, eight hundred forty-five".