1277983487859 has 16 divisors (see below), whose sum is σ = 1835117690784. Its totient is φ = 786423744000.

The previous prime is 1277983487821. The next prime is 1277983487873. The reversal of 1277983487859 is 9587843897721.

It is a happy number.

It is not a de Polignac number, because 1277983487859 - 2³⁷ = 1140544534387 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1277983487059) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 577749 + ... + 1699929.

It is an arithmetic number, because the mean of its divisors is an integer number (114694855674).

Almost surely, 2^{1277983487859} is an apocalyptic number.

1277983487859 is a deficient number, since it is larger than the sum of its proper divisors (557134202925).

1277983487859 is a wasteful number, since it uses less digits than its factorization.

1277983487859 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1151398.

The product of its digits is 1706987520, while the sum is 78.

The spelling of 1277983487859 in words is "one trillion, two hundred seventy-seven billion, nine hundred eighty-three million, four hundred eighty-seven thousand, eight hundred fifty-nine".