561500532157 has 2 divisors, whose sum is σ = 561500532158. Its totient is φ = 561500532156.

The previous prime is 561500532149. The next prime is 561500532211. The reversal of 561500532157 is 751235005165.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 526116664921 + 35383867236 = 725339^2 + 188106^2 .

It is a cyclic number.

It is not a de Polignac number, because 561500532157 - 2³ = 561500532149 is a prime.

It is a super-3 number, since 3×561500532157³ (a number of 36 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (561500539157) 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 as a sum of consecutive naturals, namely, 280750266078 + 280750266079.

It is an arithmetic number, because the mean of its divisors is an integer number (280750266079).

Almost surely, 2^561500532157 is an apocalyptic number.

It is an amenable number.

561500532157 is a deficient number, since it is larger than the sum of its proper divisors (1).

561500532157 is an equidigital number, since it uses as much as digits as its factorization.

561500532157 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 157500, while the sum is 40.

The spelling of 561500532157 in words is "five hundred sixty-one billion, five hundred million, five hundred thirty-two thousand, one hundred fifty-seven".