1678270465 has 4 divisors (see below), whose sum is σ = 2013924564. Its totient is φ = 1342616368.

The previous prime is 1678270423. The next prime is 1678270483. The reversal of 1678270465 is 5640728761.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 724201921 + 954068544 = 26911^2 + 30888^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1678270465 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 167827042 + ... + 167827051.

It is an arithmetic number, because the mean of its divisors is an integer number (503481141).

Almost surely, 2^1678270465 is an apocalyptic number.

It is an amenable number.

1678270465 is a deficient number, since it is larger than the sum of its proper divisors (335654099).

1678270465 is an equidigital number, since it uses as much as digits as its factorization.

1678270465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 335654098.

The product of its (nonzero) digits is 564480, while the sum is 46.

The square root of 1678270465 is about 40966.6994643210. The cubic root of 1678270465 is about 1188.3763052014.

The spelling of 1678270465 in words is "one billion, six hundred seventy-eight million, two hundred seventy thousand, four hundred sixty-five".