1271163497472 has 1056 divisors, whose sum is σ = 4367358148608. Its totient is φ = 365783040000.

The previous prime is 1271163497447. The next prime is 1271163497489. The reversal of 1271163497472 is 2747943611721.

1271163497472 is a `hidden beast` number, since 1 + 2 + 7 + 1 + 163 + 4 + 9 + 7 + 472 = 666.

It is a tau number, because it is divible by the number of its divisors (1056).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 6024471447 + ... + 6024471657.

Almost surely, 2^{1271163497472} is an apocalyptic number.

1271163497472 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1271163497472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2183679074304).

1271163497472 is an abundant number, since it is smaller than the sum of its proper divisors (3096194651136).

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

1271163497472 is a wasteful number, since it uses less digits than its factorization.

1271163497472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 359 (or 329 counting only the distinct ones).

The product of its digits is 3556224, while the sum is 54.

The spelling of 1271163497472 in words is "one trillion, two hundred seventy-one billion, one hundred sixty-three million, four hundred ninety-seven thousand, four hundred seventy-two".