10206561506 has 4 divisors (see below), whose sum is σ = 15309842262. Its totient is φ = 5103280752.

The previous prime is 10206561467. The next prime is 10206561509. The reversal of 10206561506 is 60516560201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 60516560201 = 17047 ⋅3549983.

It can be written as a sum of positive squares in only one way, i.e., 10204030225 + 2531281 = 101015^2 + 1591^2 .

It is not an unprimeable number, because it can be changed into a prime (10206561509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2551640375 + ... + 2551640378.

Almost surely, 2^10206561506 is an apocalyptic number.

10206561506 is a deficient number, since it is larger than the sum of its proper divisors (5103280756).

10206561506 is an equidigital number, since it uses as much as digits as its factorization.

10206561506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5103280755.

The product of its (nonzero) digits is 10800, while the sum is 32.

The spelling of 10206561506 in words is "ten billion, two hundred six million, five hundred sixty-one thousand, five hundred six".