10510391909 has 2 divisors, whose sum is σ = 10510391910. Its totient is φ = 10510391908.

The previous prime is 10510391887. The next prime is 10510391921. The reversal of 10510391909 is 90919301501.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9843616225 + 666775684 = 99215^2 + 25822^2 .

It is a cyclic number.

It is not a de Polignac number, because 10510391909 - 2¹² = 10510387813 is a prime.

It is a super-2 number, since 2×10510391909² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10510391959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5255195954 + 5255195955.

It is an arithmetic number, because the mean of its divisors is an integer number (5255195955).

Almost surely, 2^10510391909 is an apocalyptic number.

It is an amenable number.

10510391909 is a deficient number, since it is larger than the sum of its proper divisors (1).

10510391909 is an equidigital number, since it uses as much as digits as its factorization.

10510391909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10935, while the sum is 38.

The spelling of 10510391909 in words is "ten billion, five hundred ten million, three hundred ninety-one thousand, nine hundred nine".