9779104987281 has 80 divisors (see below), whose sum is σ = 17040661158400. Its totient is φ = 5586501493440.

The previous prime is 9779104987237. The next prime is 9779104987369. The reversal of 9779104987281 is 1827894019779.

9779104987281 is a `hidden beast` number, since 97 + 79 + 104 + 98 + 7 + 281 = 666.

It is not a de Polignac number, because 9779104987281 - 2²² = 9779100792977 is a prime.

It is a super-2 number, since 2×9779104987281² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9779104987081) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 103500021 + ... + 103594461.

It is an arithmetic number, because the mean of its divisors is an integer number (213008264480).

Almost surely, 2^{9779104987281} is an apocalyptic number.

It is an amenable number.

9779104987281 is a deficient number, since it is larger than the sum of its proper divisors (7261556171119).

9779104987281 is an equidigital number, since it uses as much as digits as its factorization.

9779104987281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98201 (or 98178 counting only the distinct ones).

The product of its (nonzero) digits is 128024064, while the sum is 72.

The spelling of 9779104987281 in words is "nine trillion, seven hundred seventy-nine billion, one hundred four million, nine hundred eighty-seven thousand, two hundred eighty-one".