9999481661773 has 24 divisors (see below), whose sum is σ = 10754742283488. Its totient is φ = 9289675672992.

The previous prime is 9999481661713. The next prime is 9999481661777. The reversal of 9999481661773 is 3771661849999.

9999481661773 = T₂ + T₃ + ... + T₃₉₁₄₇.

It is a de Polignac number, because none of the positive numbers 2^k-9999481661773 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 9999481661693 and 9999481661702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9999481661777) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10565886 + ... + 11473312.

It is an arithmetic number, because the mean of its divisors is an integer number (448114261812).

Almost surely, 2^{9999481661773} is an apocalyptic number.

It is an amenable number.

9999481661773 is a deficient number, since it is larger than the sum of its proper divisors (755260621715).

9999481661773 is a wasteful number, since it uses less digits than its factorization.

9999481661773 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 908073 (or 908050 counting only the distinct ones).

The product of its digits is 1111065984, while the sum is 79.

The spelling of 9999481661773 in words is "nine trillion, nine hundred ninety-nine billion, four hundred eighty-one million, six hundred sixty-one thousand, seven hundred seventy-three".