1271528681641 has 8 divisors (see below), whose sum is σ = 1301267246400. Its totient is φ = 1242118720080.

The previous prime is 1271528681611. The next prime is 1271528681663. The reversal of 1271528681641 is 1461868251721.

It is a happy number.

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 1271528681641 - 2¹³ = 1271528673449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1271528681611) 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, 82142971 + ... + 82158448.

It is an arithmetic number, because the mean of its divisors is an integer number (162658405800).

Almost surely, 2^{1271528681641} is an apocalyptic number.

It is an amenable number.

1271528681641 is a deficient number, since it is larger than the sum of its proper divisors (29738564759).

1271528681641 is a wasteful number, since it uses less digits than its factorization.

1271528681641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164301599.

The product of its digits is 1290240, while the sum is 52.

The spelling of 1271528681641 in words is "one trillion, two hundred seventy-one billion, five hundred twenty-eight million, six hundred eighty-one thousand, six hundred forty-one".