9961386769803 has 48 divisors (see below), whose sum is σ = 15702861643776. Its totient is φ = 5599584466560.

The previous prime is 9961386769771. The next prime is 9961386769837. The reversal of 9961386769803 is 3089676831699.

It is not a de Polignac number, because 9961386769803 - 2⁵ = 9961386769771 is a prime.

It is not an unprimeable number, because it can be changed into a prime (9961386769003) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2898118 + ... + 5321828.

It is an arithmetic number, because the mean of its divisors is an integer number (327142950912).

Almost surely, 2^{9961386769803} is an apocalyptic number.

9961386769803 is a deficient number, since it is larger than the sum of its proper divisors (5741474873973).

9961386769803 is a wasteful number, since it uses less digits than its factorization.

9961386769803 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2424184 (or 2424177 counting only the distinct ones).

The product of its (nonzero) digits is 634894848, while the sum is 75.

The spelling of 9961386769803 in words is "nine trillion, nine hundred sixty-one billion, three hundred eighty-six million, seven hundred sixty-nine thousand, eight hundred three".