45243032561 has 2 divisors, whose sum is σ = 45243032562. Its totient is φ = 45243032560.

The previous prime is 45243032539. The next prime is 45243032629. The reversal of 45243032561 is 16523034254.

45243032561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39852536161 + 5390496400 = 199631^2 + 73420^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-45243032561 is a prime.

It is not a weakly prime, because it can be changed into another prime (45243032761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22621516280 + 22621516281.

It is an arithmetic number, because the mean of its divisors is an integer number (22621516281).

Almost surely, 2^45243032561 is an apocalyptic number.

It is an amenable number.

45243032561 is a deficient number, since it is larger than the sum of its proper divisors (1).

45243032561 is an equidigital number, since it uses as much as digits as its factorization.

45243032561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 86400, while the sum is 35.

The spelling of 45243032561 in words is "forty-five billion, two hundred forty-three million, thirty-two thousand, five hundred sixty-one".