145642668 has 12 divisors (see below), whose sum is σ = 339832920. Its totient is φ = 48547552.

The previous prime is 145642643. The next prime is 145642703. The reversal of 145642668 is 866246541.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6068433 + ... + 6068456.

It is an arithmetic number, because the mean of its divisors is an integer number (28319410).

Almost surely, 2^145642668 is an apocalyptic number.

It is an amenable number.

145642668 is an abundant number, since it is smaller than the sum of its proper divisors (194190252).

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

145642668 is a wasteful number, since it uses less digits than its factorization.

145642668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12136896 (or 12136894 counting only the distinct ones).

The product of its digits is 276480, while the sum is 42.

The square root of 145642668 is about 12068.2504117208. The cubic root of 145642668 is about 526.1338072264.

The spelling of 145642668 in words is "one hundred forty-five million, six hundred forty-two thousand, six hundred sixty-eight".