201544555057 has 2 divisors, whose sum is σ = 201544555058. Its totient is φ = 201544555056.

The previous prime is 201544555031. The next prime is 201544555061. The reversal of 201544555057 is 750555445102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 201197999601 + 346555456 = 448551^2 + 18616^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201544555057 is a prime.

It is not a weakly prime, because it can be changed into another prime (201544555007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100772277528 + 100772277529.

It is an arithmetic number, because the mean of its divisors is an integer number (100772277529).

Almost surely, 2^201544555057 is an apocalyptic number.

It is an amenable number.

201544555057 is a deficient number, since it is larger than the sum of its proper divisors (1).

201544555057 is an equidigital number, since it uses as much as digits as its factorization.

201544555057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 700000, while the sum is 43.

The spelling of 201544555057 in words is "two hundred one billion, five hundred forty-four million, five hundred fifty-five thousand, fifty-seven".