10399340561 has 2 divisors, whose sum is σ = 10399340562. Its totient is φ = 10399340560.

The previous prime is 10399340537. The next prime is 10399340563. The reversal of 10399340561 is 16504399301.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8983248400 + 1416092161 = 94780^2 + 37631^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10399340561 is a prime.

Together with 10399340563, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (10399340563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5199670280 + 5199670281.

It is an arithmetic number, because the mean of its divisors is an integer number (5199670281).

Almost surely, 2^10399340561 is an apocalyptic number.

It is an amenable number.

10399340561 is a deficient number, since it is larger than the sum of its proper divisors (1).

10399340561 is an equidigital number, since it uses as much as digits as its factorization.

10399340561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 87480, while the sum is 41.

The spelling of 10399340561 in words is "ten billion, three hundred ninety-nine million, three hundred forty thousand, five hundred sixty-one".