1278404839106 has 8 divisors (see below), whose sum is σ = 1969434481980. Its totient is φ = 621926678448.

The previous prime is 1278404839097. The next prime is 1278404839183. The reversal of 1278404839106 is 6019384048721.

It can be written as a sum of positive squares in 2 ways, for example, as 1275284611225 + 3120227881 = 1129285^2 + 55859^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8637870461 + ... + 8637870608.

Almost surely, 2^{1278404839106} is an apocalyptic number.

1278404839106 is a deficient number, since it is larger than the sum of its proper divisors (691029642874).

1278404839106 is a wasteful number, since it uses less digits than its factorization.

1278404839106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17275741108.

The product of its (nonzero) digits is 2322432, while the sum is 53.

The spelling of 1278404839106 in words is "one trillion, two hundred seventy-eight billion, four hundred four million, eight hundred thirty-nine thousand, one hundred six".