1287763777879 has 8 divisors (see below), whose sum is σ = 1414477376640. Its totient is φ = 1166943834936.

The previous prime is 1287763777801. The next prime is 1287763777901. The reversal of 1287763777879 is 9787773677821.

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

It is a cyclic number.

It is not a de Polignac number, because 1287763777879 - 2¹⁵ = 1287763745111 is a prime.

It is a super-3 number, since 3×1287763777879³ (a number of 37 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1287763777799 and 1287763777808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1287763778879) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1473413497 + ... + 1473414370.

It is an arithmetic number, because the mean of its divisors is an integer number (176809672080).

Almost surely, 2^{1287763777879} is an apocalyptic number.

1287763777879 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

1287763777879 is a deficient number, since it is larger than the sum of its proper divisors (126713598761).

1287763777879 is a wasteful number, since it uses less digits than its factorization.

1287763777879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2946827909.

The product of its digits is 2439569664, while the sum is 79.

The spelling of 1287763777879 in words is "one trillion, two hundred eighty-seven billion, seven hundred sixty-three million, seven hundred seventy-seven thousand, eight hundred seventy-nine".