145644664 has 32 divisors (see below), whose sum is σ = 298419840. Its totient is φ = 66088800.

The previous prime is 145644647. The next prime is 145644677. The reversal of 145644664 is 466446541.

145644664 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71419 + ... + 73429.

It is an arithmetic number, because the mean of its divisors is an integer number (9325620).

Almost surely, 2^145644664 is an apocalyptic number.

It is an amenable number.

145644664 is an abundant number, since it is smaller than the sum of its proper divisors (152775176).

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

145644664 is a wasteful number, since it uses less digits than its factorization.

145644664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2851 (or 2847 counting only the distinct ones).

The product of its digits is 276480, while the sum is 40.

The square root of 145644664 is about 12068.3331077660. Note that the first 3 decimals coincide. The cubic root of 145644664 is about 526.1362107306.

It can be divided in two parts, 145 and 644664, that added together give a square (644809 = 803²).

The spelling of 145644664 in words is "one hundred forty-five million, six hundred forty-four thousand, six hundred sixty-four".