1545546161 has 2 divisors, whose sum is σ = 1545546162. Its totient is φ = 1545546160.

The previous prime is 1545546139. The next prime is 1545546169. The reversal of 1545546161 is 1616455451.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1507846561 + 37699600 = 38831^2 + 6140^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1545546161 is a prime.

It is not a weakly prime, because it can be changed into another prime (1545546169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 772773080 + 772773081.

It is an arithmetic number, because the mean of its divisors is an integer number (772773081).

Almost surely, 2^1545546161 is an apocalyptic number.

It is an amenable number.

1545546161 is a deficient number, since it is larger than the sum of its proper divisors (1).

1545546161 is an equidigital number, since it uses as much as digits as its factorization.

1545546161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72000, while the sum is 38.

The square root of 1545546161 is about 39313.4348664677. The cubic root of 1545546161 is about 1156.1849899811.

It can be divided in two parts, 15455 and 46161, that added together give a palindrome (61616).

The spelling of 1545546161 in words is "one billion, five hundred forty-five million, five hundred forty-six thousand, one hundred sixty-one".