45531649 has 2 divisors, whose sum is σ = 45531650. Its totient is φ = 45531648.

The previous prime is 45531637. The next prime is 45531667. The reversal of 45531649 is 94613554.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25684624 + 19847025 = 5068^2 + 4455^2 .

It is a cyclic number.

It is not a de Polignac number, because 45531649 - 2⁵ = 45531617 is a prime.

It is not a weakly prime, because it can be changed into another prime (45531679) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22765824 + 22765825.

It is an arithmetic number, because the mean of its divisors is an integer number (22765825).

Almost surely, 2^45531649 is an apocalyptic number.

It is an amenable number.

45531649 is a deficient number, since it is larger than the sum of its proper divisors (1).

45531649 is an equidigital number, since it uses as much as digits as its factorization.

45531649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 64800, while the sum is 37.

The square root of 45531649 is about 6747.7143537645. The cubic root of 45531649 is about 357.0846046477.

The spelling of 45531649 in words is "forty-five million, five hundred thirty-one thousand, six hundred forty-nine".