678758145 has 32 divisors (see below), whose sum is σ = 1176075264. Its totient is φ = 332294400.

The previous prime is 678758141. The next prime is 678758149. The reversal of 678758145 is 541857876.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (678758141) and next prime (678758149).

It is not a de Polignac number, because 678758145 - 2² = 678758141 is a prime.

It is not an unprimeable number, because it can be changed into a prime (678758141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 25680 + ... + 44910.

It is an arithmetic number, because the mean of its divisors is an integer number (36752352).

Almost surely, 2^678758145 is an apocalyptic number.

678758145 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

678758145 is a deficient number, since it is larger than the sum of its proper divisors (497317119).

678758145 is a wasteful number, since it uses less digits than its factorization.

678758145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19433.

The product of its digits is 1881600, while the sum is 51.

The square root of 678758145 is about 26052.9872567427. The cubic root of 678758145 is about 878.8302920577.

The spelling of 678758145 in words is "six hundred seventy-eight million, seven hundred fifty-eight thousand, one hundred forty-five".