1281899881367 has 8 divisors (see below), whose sum is σ = 1496199254016. Its totient is φ = 1075393213272.

The previous prime is 1281899881363. The next prime is 1281899881369. The reversal of 1281899881367 is 7631889981821.

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

It is not a de Polignac number, because 1281899881367 - 2² = 1281899881363 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1281899881367.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1281899881363) 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, 1948175783 + ... + 1948176440.

It is an arithmetic number, because the mean of its divisors is an integer number (187024906752).

Almost surely, 2^{1281899881367} is an apocalyptic number.

1281899881367 is a deficient number, since it is larger than the sum of its proper divisors (214299372649).

1281899881367 is an equidigital number, since it uses as much as digits as its factorization.

1281899881367 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3896352277.

The product of its digits is 83607552, while the sum is 71.

The spelling of 1281899881367 in words is "one trillion, two hundred eighty-one billion, eight hundred ninety-nine million, eight hundred eighty-one thousand, three hundred sixty-seven".