45551810561 has 2 divisors, whose sum is σ = 45551810562. Its totient is φ = 45551810560.

The previous prime is 45551810483. The next prime is 45551810599. The reversal of 45551810561 is 16501815554.

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., 37473216400 + 8078594161 = 193580^2 + 89881^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-45551810561 is a prime.

It is a super-2 number, since 2×45551810561² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (45551810261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22775905280 + 22775905281.

It is an arithmetic number, because the mean of its divisors is an integer number (22775905281).

Almost surely, 2^45551810561 is an apocalyptic number.

It is an amenable number.

45551810561 is a deficient number, since it is larger than the sum of its proper divisors (1).

45551810561 is an equidigital number, since it uses as much as digits as its factorization.

45551810561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 120000, while the sum is 41.

The spelling of 45551810561 in words is "forty-five billion, five hundred fifty-one million, eight hundred ten thousand, five hundred sixty-one".