1045654563521 has 2 divisors, whose sum is σ = 1045654563522. Its totient is φ = 1045654563520.

The previous prime is 1045654563479. The next prime is 1045654563529. The reversal of 1045654563521 is 1253654565401.

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., 1033363737025 + 12290826496 = 1016545^2 + 110864^2 .

It is a cyclic number.

It is not a de Polignac number, because 1045654563521 - 2³⁴ = 1028474694337 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1045654563529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 522827281760 + 522827281761.

It is an arithmetic number, because the mean of its divisors is an integer number (522827281761).

Almost surely, 2^{1045654563521} is an apocalyptic number.

It is an amenable number.

1045654563521 is a deficient number, since it is larger than the sum of its proper divisors (1).

1045654563521 is an equidigital number, since it uses as much as digits as its factorization.

1045654563521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2160000, while the sum is 47.

The spelling of 1045654563521 in words is "one trillion, forty-five billion, six hundred fifty-four million, five hundred sixty-three thousand, five hundred twenty-one".