145648644 has 12 divisors (see below), whose sum is σ = 339846864. Its totient is φ = 48549544.

The previous prime is 145648621. The next prime is 145648669. The reversal of 145648644 is 446846541.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 145648596 and 145648605.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6068682 + ... + 6068705.

It is an arithmetic number, because the mean of its divisors is an integer number (28320572).

Almost surely, 2^145648644 is an apocalyptic number.

It is an amenable number.

145648644 is an abundant number, since it is smaller than the sum of its proper divisors (194198220).

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

145648644 is a wasteful number, since it uses less digits than its factorization.

145648644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12137394 (or 12137392 counting only the distinct ones).

The product of its digits is 368640, while the sum is 42.

The square root of 145648644 is about 12068.4980009942. The cubic root of 145648644 is about 526.1410032234.

The spelling of 145648644 in words is "one hundred forty-five million, six hundred forty-eight thousand, six hundred forty-four".