561500532149 has 2 divisors, whose sum is σ = 561500532150. Its totient is φ = 561500532148.

The previous prime is 561500532133. The next prime is 561500532157. The reversal of 561500532149 is 941235005165.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 518212816900 + 43287715249 = 719870^2 + 208057^2 .

It is a cyclic number.

It is not a de Polignac number, because 561500532149 - 2⁴ = 561500532133 is a prime.

It is a super-2 number, since 2×561500532149² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (561500532449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 280750266074 + 280750266075.

It is an arithmetic number, because the mean of its divisors is an integer number (280750266075).

Almost surely, 2^561500532149 is an apocalyptic number.

It is an amenable number.

561500532149 is a deficient number, since it is larger than the sum of its proper divisors (1).

561500532149 is an equidigital number, since it uses as much as digits as its factorization.

561500532149 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 162000, while the sum is 41.

The spelling of 561500532149 in words is "five hundred sixty-one billion, five hundred million, five hundred thirty-two thousand, one hundred forty-nine".