678290155 has 8 divisors (see below), whose sum is σ = 816826032. Its totient is φ = 540713568.

The previous prime is 678290153. The next prime is 678290159. The reversal of 678290155 is 551092876.

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

It is a cyclic number.

It is not a de Polignac number, because 678290155 - 2¹ = 678290153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (678290153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 238264 + ... + 241093.

It is an arithmetic number, because the mean of its divisors is an integer number (102103254).

Almost surely, 2^678290155 is an apocalyptic number.

678290155 is a deficient number, since it is larger than the sum of its proper divisors (138535877).

678290155 is a wasteful number, since it uses less digits than its factorization.

678290155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 479645.

The product of its (nonzero) digits is 151200, while the sum is 43.

The square root of 678290155 is about 26044.0042044229. The cubic root of 678290155 is about 878.6282670548.

The spelling of 678290155 in words is "six hundred seventy-eight million, two hundred ninety thousand, one hundred fifty-five".