145664001 has 20 divisors (see below), whose sum is σ = 248683072. Its totient is φ = 83236248.

The previous prime is 145663993. The next prime is 145664011. The reversal of 145664001 is 100466541.

145664001 is a `hidden beast` number, since 14 + 5 + 6 + 640 + 0 + 1 = 666.

It is not a de Polignac number, because 145664001 - 2³ = 145663993 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (145664011) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 127885 + ... + 129018.

Almost surely, 2^145664001 is an apocalyptic number.

It is an amenable number.

145664001 is a deficient number, since it is larger than the sum of its proper divisors (103019071).

145664001 is an equidigital number, since it uses as much as digits as its factorization.

145664001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256922 (or 256913 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 145664001 is about 12069.1342274415. The cubic root of 145664001 is about 526.1594944436.

The spelling of 145664001 in words is "one hundred forty-five million, six hundred sixty-four thousand, one".