154865664 has 78 divisors (see below), whose sum is σ = 447441566. Its totient is φ = 51609600.

The previous prime is 154865663. The next prime is 154865671. The reversal of 154865664 is 466568451.

154865664 is a `hidden beast` number, since 1 + 5 + 4 + 86 + 566 + 4 = 666.

154865664 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 95883264 + 58982400 = 9792^2 + 7680^2 .

It is not an unprimeable number, because it can be changed into a prime (154865663) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 34764 + ... + 38964.

Almost surely, 2^154865664 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 154865664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (223720783).

154865664 is an abundant number, since it is smaller than the sum of its proper divisors (292575902).

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

154865664 is an equidigital number, since it uses as much as digits as its factorization.

154865664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4231 (or 4206 counting only the distinct ones).

The product of its digits is 691200, while the sum is 45.

The square root of 154865664 is about 12444.5033649399. The cubic root of 154865664 is about 537.0133055388.

The spelling of 154865664 in words is "one hundred fifty-four million, eight hundred sixty-five thousand, six hundred sixty-four".