2143611403256 has 8 divisors (see below), whose sum is σ = 4019271381120. Its totient is φ = 1071805701624.

The previous prime is 2143611403249. The next prime is 2143611403261. The reversal of 2143611403256 is 6523041163412.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 133975712696 + ... + 133975712711.

It is an arithmetic number, because the mean of its divisors is an integer number (502408922640).

Almost surely, 2^{2143611403256} is an apocalyptic number.

It is an amenable number.

2143611403256 is a deficient number, since it is larger than the sum of its proper divisors (1875659977864).

2143611403256 is a wasteful number, since it uses less digits than its factorization.

2143611403256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 267951425413 (or 267951425409 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 38.

Adding to 2143611403256 its reverse (6523041163412), we get a palindrome (8666652566668).

The spelling of 2143611403256 in words is "two trillion, one hundred forty-three billion, six hundred eleven million, four hundred three thousand, two hundred fifty-six".