145981668 has 48 divisors (see below), whose sum is σ = 389975040. Its totient is φ = 41635104.

The previous prime is 145981637. The next prime is 145981673. The reversal of 145981668 is 866189541.

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 15 ways as a sum of consecutive naturals, for example, 61243 + ... + 63581.

It is an arithmetic number, because the mean of its divisors is an integer number (8124480).

Almost surely, 2^145981668 is an apocalyptic number.

It is an amenable number.

145981668 is an abundant number, since it is smaller than the sum of its proper divisors (243993372).

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

145981668 is a wasteful number, since it uses less digits than its factorization.

145981668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3096 (or 3094 counting only the distinct ones).

The product of its digits is 414720, while the sum is 48.

The square root of 145981668 is about 12082.2873662233. The cubic root of 145981668 is about 526.5417031583.

The spelling of 145981668 in words is "one hundred forty-five million, nine hundred eighty-one thousand, six hundred sixty-eight".