10545155209 has 2 divisors, whose sum is σ = 10545155210. Its totient is φ = 10545155208.

The previous prime is 10545155171. The next prime is 10545155219. The reversal of 10545155209 is 90255154501.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9830127609 + 715027600 = 99147^2 + 26740^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10545155209 is a prime.

It is a super-2 number, since 2×10545155209² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (10545155219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5272577604 + 5272577605.

It is an arithmetic number, because the mean of its divisors is an integer number (5272577605).

Almost surely, 2^10545155209 is an apocalyptic number.

It is an amenable number.

10545155209 is a deficient number, since it is larger than the sum of its proper divisors (1).

10545155209 is an equidigital number, since it uses as much as digits as its factorization.

10545155209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 45000, while the sum is 37.

The spelling of 10545155209 in words is "ten billion, five hundred forty-five million, one hundred fifty-five thousand, two hundred nine".