154640985 has 8 divisors (see below), whose sum is σ = 247425600. Its totient is φ = 82475184.

The previous prime is 154640977. The next prime is 154641043. The reversal of 154640985 is 589046451.

154640985 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 154640985 - 2³ = 154640977 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5154685 + ... + 5154714.

It is an arithmetic number, because the mean of its divisors is an integer number (30928200).

Almost surely, 2^154640985 is an apocalyptic number.

154640985 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

154640985 is a deficient number, since it is larger than the sum of its proper divisors (92784615).

154640985 is a wasteful number, since it uses less digits than its factorization.

154640985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10309407.

The product of its (nonzero) digits is 172800, while the sum is 42.

The square root of 154640985 is about 12435.4728498759. The cubic root of 154640985 is about 536.7534803341.

The spelling of 154640985 in words is "one hundred fifty-four million, six hundred forty thousand, nine hundred eighty-five".