45612561 has 4 divisors (see below), whose sum is σ = 60816752. Its totient is φ = 30408372.

The previous prime is 45612533. The next prime is 45612569. The reversal of 45612561 is 16521654.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 45612561 - 2⁵ = 45612529 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (45612569) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7602091 + ... + 7602096.

It is an arithmetic number, because the mean of its divisors is an integer number (15204188).

Almost surely, 2^45612561 is an apocalyptic number.

It is an amenable number.

45612561 is a deficient number, since it is larger than the sum of its proper divisors (15204191).

45612561 is a wasteful number, since it uses less digits than its factorization.

45612561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15204190.

The product of its digits is 7200, while the sum is 30.

The square root of 45612561 is about 6753.7072041953. The cubic root of 45612561 is about 357.2959984995.

The spelling of 45612561 in words is "forty-five million, six hundred twelve thousand, five hundred sixty-one".