45649178 has 8 divisors (see below), whose sum is σ = 68544660. Its totient is φ = 22800960.

The previous prime is 45649171. The next prime is 45649189. The reversal of 45649178 is 87194654.

It can be written as a sum of positive squares in 2 ways, for example, as 43467649 + 2181529 = 6593^2 + 1477^2 .

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (45649171) 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, 9293 + ... + 13328.

Almost surely, 2^45649178 is an apocalyptic number.

45649178 is a deficient number, since it is larger than the sum of its proper divisors (22895482).

45649178 is a wasteful number, since it uses less digits than its factorization.

45649178 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23632.

The product of its digits is 241920, while the sum is 44.

The square root of 45649178 is about 6756.4175418634. The cubic root of 45649178 is about 357.3915833405.

The spelling of 45649178 in words is "forty-five million, six hundred forty-nine thousand, one hundred seventy-eight".