9781607044061 has 2 divisors, whose sum is σ = 9781607044062. Its totient is φ = 9781607044060.

The previous prime is 9781607044021. The next prime is 9781607044063. The reversal of 9781607044061 is 1604407061879.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7163149076836 + 2618457967225 = 2676406^2 + 1618165^2 .

It is a cyclic number.

It is not a de Polignac number, because 9781607044061 - 2²² = 9781602849757 is a prime.

Together with 9781607044063, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 9781607043994 and 9781607044012.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9781607044063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4890803522030 + 4890803522031.

It is an arithmetic number, because the mean of its divisors is an integer number (4890803522031).

Almost surely, 2^{9781607044061} is an apocalyptic number.

It is an amenable number.

9781607044061 is a deficient number, since it is larger than the sum of its proper divisors (1).

9781607044061 is an equidigital number, since it uses as much as digits as its factorization.

9781607044061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2032128, while the sum is 53.

The spelling of 9781607044061 in words is "nine trillion, seven hundred eighty-one billion, six hundred seven million, forty-four thousand, sixty-one".