45661561 has 8 divisors (see below), whose sum is σ = 49914144. Its totient is φ = 41425920.

The previous prime is 45661559. The next prime is 45661597. The reversal of 45661561 is 16516654.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 45661561 - 2¹ = 45661559 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (45661531) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1785 + ... + 9721.

It is an arithmetic number, because the mean of its divisors is an integer number (6239268).

Almost surely, 2^45661561 is an apocalyptic number.

It is an amenable number.

45661561 is a deficient number, since it is larger than the sum of its proper divisors (4252583).

45661561 is a wasteful number, since it uses less digits than its factorization.

45661561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8471.

The product of its digits is 21600, while the sum is 34.

The square root of 45661561 is about 6757.3338677322. Note that the first 3 decimals coincide. The cubic root of 45661561 is about 357.4238962981.

The spelling of 45661561 in words is "forty-five million, six hundred sixty-one thousand, five hundred sixty-one".