1545100561 has 2 divisors, whose sum is σ = 1545100562. Its totient is φ = 1545100560.

The previous prime is 1545100547. The next prime is 1545100567. The reversal of 1545100561 is 1650015451.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1534210561 + 10890000 = 39169^2 + 3300^2 .

It is a cyclic number.

It is not a de Polignac number, because 1545100561 - 2²⁵ = 1511546129 is a prime.

It is not a weakly prime, because it can be changed into another prime (1545100567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 772550280 + 772550281.

It is an arithmetic number, because the mean of its divisors is an integer number (772550281).

Almost surely, 2^1545100561 is an apocalyptic number.

It is an amenable number.

1545100561 is a deficient number, since it is larger than the sum of its proper divisors (1).

1545100561 is an equidigital number, since it uses as much as digits as its factorization.

1545100561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3000, while the sum is 28.

The square root of 1545100561 is about 39307.7671841075. The cubic root of 1545100561 is about 1156.0738651751.

The spelling of 1545100561 in words is "one billion, five hundred forty-five million, one hundred thousand, five hundred sixty-one".