10781799913 has 2 divisors, whose sum is σ = 10781799914. Its totient is φ = 10781799912.

The previous prime is 10781799871. The next prime is 10781799923. The reversal of 10781799913 is 31999718701.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10673369344 + 108430569 = 103312^2 + 10413^2 .

It is a cyclic number.

It is not a de Polignac number, because 10781799913 - 2³³ = 2191865321 is a prime.

It is a super-3 number, since 3×10781799913³ (a number of 31 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (10781799923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5390899956 + 5390899957.

It is an arithmetic number, because the mean of its divisors is an integer number (5390899957).

Almost surely, 2^10781799913 is an apocalyptic number.

It is an amenable number.

10781799913 is a deficient number, since it is larger than the sum of its proper divisors (1).

10781799913 is an equidigital number, since it uses as much as digits as its factorization.

10781799913 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 857304, while the sum is 55.

The spelling of 10781799913 in words is "ten billion, seven hundred eighty-one million, seven hundred ninety-nine thousand, nine hundred thirteen".