45506778 has 8 divisors (see below), whose sum is σ = 91013568. Its totient is φ = 15168924.

The previous prime is 45506777. The next prime is 45506789. The reversal of 45506778 is 87760554.

45506778 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

45506778 is an admirable number.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (45506777) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3792226 + ... + 3792237.

It is an arithmetic number, because the mean of its divisors is an integer number (11376696).

Almost surely, 2^45506778 is an apocalyptic number.

45506778 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

45506778 is a wasteful number, since it uses less digits than its factorization.

45506778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7584468.

The product of its (nonzero) digits is 235200, while the sum is 42.

The square root of 45506778 is about 6745.8711816933. The cubic root of 45506778 is about 357.0195753846.

The spelling of 45506778 in words is "forty-five million, five hundred six thousand, seven hundred seventy-eight".