45501638 has 64 divisors (see below), whose sum is σ = 89631360. Its totient is φ = 16837632.

The previous prime is 45501629. The next prime is 45501641. The reversal of 45501638 is 83610554.

It is a happy number.

45501638 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 195170 + ... + 195402.

It is an arithmetic number, because the mean of its divisors is an integer number (1400490).

Almost surely, 2^45501638 is an apocalyptic number.

45501638 is a deficient number, since it is larger than the sum of its proper divisors (44129722).

45501638 is a wasteful number, since it uses less digits than its factorization.

45501638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 321.

The product of its (nonzero) digits is 14400, while the sum is 32.

The square root of 45501638 is about 6745.4901971614. The cubic root of 45501638 is about 357.0061330669.

It can be divided in two parts, 4550 and 1638, that multiplied together give a square (7452900 = 2730²).

The spelling of 45501638 in words is "forty-five million, five hundred one thousand, six hundred thirty-eight".