145993664 has 14 divisors (see below), whose sum is σ = 289706304. Its totient is φ = 72996800.

The previous prime is 145993651. The next prime is 145993693. The reversal of 145993664 is 466399541.

It is a happy number.

145993664 is digitally balanced in base 2 and base 3, because in such bases 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 as a sum of consecutive naturals, namely, 1140512 + ... + 1140639.

Almost surely, 2^145993664 is an apocalyptic number.

It is an amenable number.

145993664 is a deficient number, since it is larger than the sum of its proper divisors (143712640).

145993664 is an equidigital number, since it uses as much as digits as its factorization.

145993664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2281163 (or 2281153 counting only the distinct ones).

The product of its digits is 699840, while the sum is 47.

The square root of 145993664 is about 12082.7837852045. The cubic root of 145993664 is about 526.5561255657.

The spelling of 145993664 in words is "one hundred forty-five million, nine hundred ninety-three thousand, six hundred sixty-four".