52500005561 has 2 divisors, whose sum is σ = 52500005562. Its totient is φ = 52500005560.

The previous prime is 52500005539. The next prime is 52500005563. The reversal of 52500005561 is 16550000525.

52500005561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27770556025 + 24729449536 = 166645^2 + 157256^2 .

It is a cyclic number.

It is not a de Polignac number, because 52500005561 - 2¹⁴ = 52499989177 is a prime.

Together with 52500005563, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (52500005563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26250002780 + 26250002781.

It is an arithmetic number, because the mean of its divisors is an integer number (26250002781).

Almost surely, 2^52500005561 is an apocalyptic number.

It is an amenable number.

52500005561 is a deficient number, since it is larger than the sum of its proper divisors (1).

52500005561 is an equidigital number, since it uses as much as digits as its factorization.

52500005561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7500, while the sum is 29.

The spelling of 52500005561 in words is "fifty-two billion, five hundred million, five thousand, five hundred sixty-one".