105620056505 has 4 divisors (see below), whose sum is σ = 126744067812. Its totient is φ = 84496045200.

The previous prime is 105620056481. The next prime is 105620056513. The reversal of 105620056505 is 505650026501.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 505650026501 = 575723 ⋅878287.

It can be written as a sum of positive squares in 2 ways, for example, as 44223145849 + 61396910656 = 210293^2 + 247784^2 .

It is not a de Polignac number, because 105620056505 - 2¹⁸ = 105619794361 is a prime.

It is a super-2 number, since 2×105620056505² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10562005646 + ... + 10562005655.

It is an arithmetic number, because the mean of its divisors is an integer number (31686016953).

Almost surely, 2^105620056505 is an apocalyptic number.

It is an amenable number.

105620056505 is a deficient number, since it is larger than the sum of its proper divisors (21124011307).

105620056505 is an equidigital number, since it uses as much as digits as its factorization.

105620056505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21124011306.

The product of its (nonzero) digits is 45000, while the sum is 35.

The spelling of 105620056505 in words is "one hundred five billion, six hundred twenty million, fifty-six thousand, five hundred five".