105640185481 has 2 divisors, whose sum is σ = 105640185482. Its totient is φ = 105640185480.

The previous prime is 105640185463. The next prime is 105640185557. The reversal of 105640185481 is 184581046501.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 101750792256 + 3889393225 = 318984^2 + 62365^2 .

It is a cyclic number.

It is not a de Polignac number, because 105640185481 - 2⁷ = 105640185353 is a prime.

It is a super-2 number, since 2×105640185481² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (105640185461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52820092740 + 52820092741.

It is an arithmetic number, because the mean of its divisors is an integer number (52820092741).

Almost surely, 2^105640185481 is an apocalyptic number.

It is an amenable number.

105640185481 is a deficient number, since it is larger than the sum of its proper divisors (1).

105640185481 is an equidigital number, since it uses as much as digits as its factorization.

105640185481 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 153600, while the sum is 43.

The spelling of 105640185481 in words is "one hundred five billion, six hundred forty million, one hundred eighty-five thousand, four hundred eighty-one".