145565646 has 16 divisors (see below), whose sum is σ = 300523008. Its totient is φ = 46956600.

The previous prime is 145565639. The next prime is 145565647. The reversal of 145565646 is 646565541.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 145565598 and 145565607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145565647) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 391120 + ... + 391491.

It is an arithmetic number, because the mean of its divisors is an integer number (18782688).

Almost surely, 2^145565646 is an apocalyptic number.

145565646 is an abundant number, since it is smaller than the sum of its proper divisors (154957362).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

145565646 is a wasteful number, since it uses less digits than its factorization.

145565646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 782647.

The product of its digits is 432000, while the sum is 42.

The square root of 145565646 is about 12065.0588892056. The cubic root of 145565646 is about 526.0410436054.

It can be divided in two parts, 14556 and 5646, that added together give a palindrome (20202).

The spelling of 145565646 in words is "one hundred forty-five million, five hundred sixty-five thousand, six hundred forty-six".