45561491 has 2 divisors, whose sum is σ = 45561492. Its totient is φ = 45561490.

The previous prime is 45561473. The next prime is 45561497. The reversal of 45561491 is 19416554.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 45561491 - 2¹⁰ = 45560467 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (45561497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22780745 + 22780746.

It is an arithmetic number, because the mean of its divisors is an integer number (22780746).

Almost surely, 2^45561491 is an apocalyptic number.

45561491 is a deficient number, since it is larger than the sum of its proper divisors (1).

45561491 is an equidigital number, since it uses as much as digits as its factorization.

45561491 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 21600, while the sum is 35.

The square root of 45561491 is about 6749.9252588455. The cubic root of 45561491 is about 357.1626001505.

The spelling of 45561491 in words is "forty-five million, five hundred sixty-one thousand, four hundred ninety-one".