145664811 has 20 divisors (see below), whose sum is σ = 229053000. Its totient is φ = 91997856.

The previous prime is 145664801. The next prime is 145664833. The reversal of 145664811 is 118466541.

145664811 is a `hidden beast` number, since 1 + 4 + 5 + 6 + 648 + 1 + 1 = 666.

It is not a de Polignac number, because 145664811 - 2⁶ = 145664747 is a prime.

It is not an unprimeable number, because it can be changed into a prime (145664801) 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, 45786 + ... + 48863.

It is an arithmetic number, because the mean of its divisors is an integer number (11452650).

Almost surely, 2^145664811 is an apocalyptic number.

145664811 is a deficient number, since it is larger than the sum of its proper divisors (83388189).

145664811 is an equidigital number, since it uses as much as digits as its factorization.

145664811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94680 (or 94671 counting only the distinct ones).

The product of its digits is 23040, while the sum is 36.

The square root of 145664811 is about 12069.1677840686. The cubic root of 145664811 is about 526.1604697209.

The spelling of 145664811 in words is "one hundred forty-five million, six hundred sixty-four thousand, eight hundred eleven".