105661425587 has 2 divisors, whose sum is σ = 105661425588. Its totient is φ = 105661425586.

The previous prime is 105661425547. The next prime is 105661425619. The reversal of 105661425587 is 785524166501.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 105661425587 - 2¹² = 105661421491 is a prime.

It is a super-2 number, since 2×105661425587² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (105661425547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52830712793 + 52830712794.

It is an arithmetic number, because the mean of its divisors is an integer number (52830712794).

Almost surely, 2^105661425587 is an apocalyptic number.

105661425587 is a deficient number, since it is larger than the sum of its proper divisors (1).

105661425587 is an equidigital number, since it uses as much as digits as its factorization.

105661425587 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2016000, while the sum is 50.

The spelling of 105661425587 in words is "one hundred five billion, six hundred sixty-one million, four hundred twenty-five thousand, five hundred eighty-seven".