10165561563 has 6 divisors (see below), whose sum is σ = 13554314932. Its totient is φ = 6776924620.

The previous prime is 10165561543. The next prime is 10165561573. The reversal of 10165561563 is 36516556101.

It is not a de Polignac number, because 10165561563 - 2⁵ = 10165561531 is a prime.

It is a super-2 number, since 2×10165561563² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10165561543) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 145528 + ... + 203738.

Almost surely, 2^10165561563 is an apocalyptic number.

10165561563 is a deficient number, since it is larger than the sum of its proper divisors (3388753369).

10165561563 is an frugal number, since it uses more digits than its factorization.

10165561563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116425 (or 58214 counting only the distinct ones).

The product of its (nonzero) digits is 81000, while the sum is 39.

The spelling of 10165561563 in words is "ten billion, one hundred sixty-five million, five hundred sixty-one thousand, five hundred sixty-three".