9961443147743 has 4 divisors (see below), whose sum is σ = 10001130172488. Its totient is φ = 9921756123000.

The previous prime is 9961443147679. The next prime is 9961443147769. The reversal of 9961443147743 is 3477413441699.

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 9961443147743 - 2⁶ = 9961443147679 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9961443147343) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19843511996 + ... + 19843512497.

It is an arithmetic number, because the mean of its divisors is an integer number (2500282543122).

Almost surely, 2^{9961443147743} is an apocalyptic number.

9961443147743 is a deficient number, since it is larger than the sum of its proper divisors (39687024745).

9961443147743 is a wasteful number, since it uses less digits than its factorization.

9961443147743 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39687024744.

The product of its digits is 54867456, while the sum is 62.

The spelling of 9961443147743 in words is "nine trillion, nine hundred sixty-one billion, four hundred forty-three million, one hundred forty-seven thousand, seven hundred forty-three".