1231753067647 has 4 divisors (see below), whose sum is σ = 1231760240656. Its totient is φ = 1231745894640.

The previous prime is 1231753067593. The next prime is 1231753067659. The reversal of 1231753067647 is 7467603571321.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1231753067647 - 2³⁹ = 681997253759 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1231753067594 and 1231753067603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231753068647) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 3322443 + ... + 3674524.

It is an arithmetic number, because the mean of its divisors is an integer number (307940060164).

Almost surely, 2^{1231753067647} is an apocalyptic number.

1231753067647 is a deficient number, since it is larger than the sum of its proper divisors (7173009).

1231753067647 is an equidigital number, since it uses as much as digits as its factorization.

1231753067647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7173008.

The product of its (nonzero) digits is 4445280, while the sum is 52.

The spelling of 1231753067647 in words is "one trillion, two hundred thirty-one billion, seven hundred fifty-three million, sixty-seven thousand, six hundred forty-seven".