1277064678 has 8 divisors (see below), whose sum is σ = 2554129368. Its totient is φ = 425688224.

The previous prime is 1277064647. The next prime is 1277064703. The reversal of 1277064678 is 8764607721.

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

1277064678 is an admirable number.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 106422051 + ... + 106422062.

It is an arithmetic number, because the mean of its divisors is an integer number (319266171).

Almost surely, 2^1277064678 is an apocalyptic number.

1277064678 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1277064678 is a wasteful number, since it uses less digits than its factorization.

1277064678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212844118.

The product of its (nonzero) digits is 790272, while the sum is 48.

The square root of 1277064678 is about 35736.0417226083. The cubic root of 1277064678 is about 1084.9364437135.

The spelling of 1277064678 in words is "one billion, two hundred seventy-seven million, sixty-four thousand, six hundred seventy-eight".