1287611376856 has 16 divisors (see below), whose sum is σ = 2759167236240. Its totient is φ = 551833447200.

The previous prime is 1287611376839. The next prime is 1287611376881. The reversal of 1287611376856 is 6586731167821.

It is a junction number, because it is equal to n+sod(n) for n = 1287611376794 and 1287611376803.

It is a congruent number.

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, 11496530095 + ... + 11496530206.

It is an arithmetic number, because the mean of its divisors is an integer number (172447952265).

Almost surely, 2^{1287611376856} is an apocalyptic number.

It is an amenable number.

1287611376856 is an abundant number, since it is smaller than the sum of its proper divisors (1471555859384).

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

1287611376856 is a wasteful number, since it uses less digits than its factorization.

1287611376856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22993060314 (or 22993060310 counting only the distinct ones).

The product of its digits is 20321280, while the sum is 61.

The spelling of 1287611376856 in words is "one trillion, two hundred eighty-seven billion, six hundred eleven million, three hundred seventy-six thousand, eight hundred fifty-six".