105355661639 has 2 divisors, whose sum is σ = 105355661640. Its totient is φ = 105355661638.

The previous prime is 105355661513. The next prime is 105355661683. The reversal of 105355661639 is 936166553501.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 105355661639 - 2¹² = 105355657543 is a prime.

It is a super-2 number, since 2×105355661639² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (105355661039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52677830819 + 52677830820.

It is an arithmetic number, because the mean of its divisors is an integer number (52677830820).

Almost surely, 2^105355661639 is an apocalyptic number.

105355661639 is a deficient number, since it is larger than the sum of its proper divisors (1).

105355661639 is an equidigital number, since it uses as much as digits as its factorization.

105355661639 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2187000, while the sum is 50.

The spelling of 105355661639 in words is "one hundred five billion, three hundred fifty-five million, six hundred sixty-one thousand, six hundred thirty-nine".