145644913 has 16 divisors (see below), whose sum is σ = 158050816. Its totient is φ = 133902720.

The previous prime is 145644893. The next prime is 145644923. The reversal of 145644913 is 319446541.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-145644913 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145644923) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47845 + ... + 50797.

It is an arithmetic number, because the mean of its divisors is an integer number (9878176).

Almost surely, 2^145644913 is an apocalyptic number.

It is an amenable number.

145644913 is a deficient number, since it is larger than the sum of its proper divisors (12405903).

145644913 is a wasteful number, since it uses less digits than its factorization.

145644913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3064.

The product of its digits is 51840, while the sum is 37.

The square root of 145644913 is about 12068.3434240164. The cubic root of 145644913 is about 526.1365105650.

The spelling of 145644913 in words is "one hundred forty-five million, six hundred forty-four thousand, nine hundred thirteen".