10155565505 has 4 divisors (see below), whose sum is σ = 12186678612. Its totient is φ = 8124452400.

The previous prime is 10155565487. The next prime is 10155565579. The reversal of 10155565505 is 50556555101.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50556555101 = 13 ⋅3888965777.

It can be written as a sum of positive squares in 2 ways, for example, as 5091250609 + 5064314896 = 71353^2 + 71164^2 .

It is a de Polignac number, because none of the positive numbers 2^k-10155565505 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1015556546 + ... + 1015556555.

It is an arithmetic number, because the mean of its divisors is an integer number (3046669653).

Almost surely, 2^10155565505 is an apocalyptic number.

It is an amenable number.

10155565505 is a deficient number, since it is larger than the sum of its proper divisors (2031113107).

10155565505 is an equidigital number, since it uses as much as digits as its factorization.

10155565505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2031113106.

The product of its (nonzero) digits is 93750, while the sum is 38.

The spelling of 10155565505 in words is "ten billion, one hundred fifty-five million, five hundred sixty-five thousand, five hundred five".