1271206533408 has 192 divisors, whose sum is σ = 3938115428352. Its totient is φ = 351353917440.

The previous prime is 1271206533403. The next prime is 1271206533431. The reversal of 1271206533408 is 8043356021721.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a self number, because there is not a number n which added to its sum of digits gives 1271206533408.

It is not an unprimeable number, because it can be changed into a prime (1271206533403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 64215160 + ... + 64234952.

It is an arithmetic number, because the mean of its divisors is an integer number (20511017856).

Almost surely, 2^{1271206533408} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1271206533408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1969057714176).

1271206533408 is an abundant number, since it is smaller than the sum of its proper divisors (2666908894944).

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

1271206533408 is a wasteful number, since it uses less digits than its factorization.

1271206533408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22927 (or 22919 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 42.

The spelling of 1271206533408 in words is "one trillion, two hundred seventy-one billion, two hundred six million, five hundred thirty-three thousand, four hundred eight".