154664640 has 448 divisors, whose sum is σ = 629838720. Its totient is φ = 35831808.

The previous prime is 154664599. The next prime is 154664641. The reversal of 154664640 is 46466451.

154664640 is a `hidden beast` number, since 1 + 5 + 4 + 6 + 6 + 4 + 640 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 154664595 and 154664604.

It is not an unprimeable number, because it can be changed into a prime (154664641) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 9097912 + ... + 9097928.

It is an arithmetic number, because the mean of its divisors is an integer number (1405890).

Almost surely, 2^154664640 is an apocalyptic number.

154664640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 154664640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (314919360).

154664640 is an abundant number, since it is smaller than the sum of its proper divisors (475174080).

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

154664640 is an equidigital number, since it uses as much as digits as its factorization.

154664640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68 (or 40 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 36.

The square root of 154664640 is about 12436.4239232989. The cubic root of 154664640 is about 536.7808474995.

The spelling of 154664640 in words is "one hundred fifty-four million, six hundred sixty-four thousand, six hundred forty".