105561511049 has 2 divisors, whose sum is σ = 105561511050. Its totient is φ = 105561511048.

The previous prime is 105561511043. The next prime is 105561511079. The reversal of 105561511049 is 940115165501.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 59650735225 + 45910775824 = 244235^2 + 214268^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-105561511049 is a prime.

It is a super-2 number, since 2×105561511049² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (105561511043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52780755524 + 52780755525.

It is an arithmetic number, because the mean of its divisors is an integer number (52780755525).

Almost surely, 2^105561511049 is an apocalyptic number.

It is an amenable number.

105561511049 is a deficient number, since it is larger than the sum of its proper divisors (1).

105561511049 is an equidigital number, since it uses as much as digits as its factorization.

105561511049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27000, while the sum is 38.

The spelling of 105561511049 in words is "one hundred five billion, five hundred sixty-one million, five hundred eleven thousand, forty-nine".