103718083951861 has 2 divisors, whose sum is σ = 103718083951862. Its totient is φ = 103718083951860.

The previous prime is 103718083951843. The next prime is 103718083951891. The reversal of 103718083951861 is 168159380817301.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 88747421742225 + 14970662209636 = 9420585^2 + 3869194^2 .

It is an emirp because it is prime and its reverse (168159380817301) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 103718083951861 - 2¹⁷ = 103718083820789 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 103718083951861.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (103718083951831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51859041975930 + 51859041975931.

It is an arithmetic number, because the mean of its divisors is an integer number (51859041975931).

Almost surely, 2^{103718083951861} is an apocalyptic number.

It is an amenable number.

103718083951861 is a deficient number, since it is larger than the sum of its proper divisors (1).

103718083951861 is an equidigital number, since it uses as much as digits as its factorization.

103718083951861 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8709120, while the sum is 61.

The spelling of 103718083951861 in words is "one hundred three trillion, seven hundred eighteen billion, eighty-three million, nine hundred fifty-one thousand, eight hundred sixty-one".