1501042045561 has 2 divisors, whose sum is σ = 1501042045562. Its totient is φ = 1501042045560.

The previous prime is 1501042045523. The next prime is 1501042045579. The reversal of 1501042045561 is 1655402401051.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1314849795561 + 186192250000 = 1146669^2 + 431500^2 .

It is a cyclic number.

It is not a de Polignac number, because 1501042045561 - 2¹⁵ = 1501042012793 is a prime.

It is not a weakly prime, because it can be changed into another prime (1501042045501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 750521022780 + 750521022781.

It is an arithmetic number, because the mean of its divisors is an integer number (750521022781).

Almost surely, 2^{1501042045561} is an apocalyptic number.

It is an amenable number.

1501042045561 is a deficient number, since it is larger than the sum of its proper divisors (1).

1501042045561 is an equidigital number, since it uses as much as digits as its factorization.

1501042045561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24000, while the sum is 34.

The spelling of 1501042045561 in words is "one trillion, five hundred one billion, forty-two million, forty-five thousand, five hundred sixty-one".