10195263781 has 2 divisors, whose sum is σ = 10195263782. Its totient is φ = 10195263780.

The previous prime is 10195263769. The next prime is 10195263823. The reversal of 10195263781 is 18736259101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7188496225 + 3006767556 = 84785^2 + 54834^2 .

It is a cyclic number.

It is not a de Polignac number, because 10195263781 - 2⁹ = 10195263269 is a prime.

It is a super-2 number, since 2×10195263781² (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 (10195269781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5097631890 + 5097631891.

It is an arithmetic number, because the mean of its divisors is an integer number (5097631891).

Almost surely, 2^10195263781 is an apocalyptic number.

It is an amenable number.

10195263781 is a deficient number, since it is larger than the sum of its proper divisors (1).

10195263781 is an equidigital number, since it uses as much as digits as its factorization.

10195263781 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 90720, while the sum is 43.

The spelling of 10195263781 in words is "ten billion, one hundred ninety-five million, two hundred sixty-three thousand, seven hundred eighty-one".