45639591 has 8 divisors (see below), whose sum is σ = 62951280. Its totient is φ = 29377152.

The previous prime is 45639589. The next prime is 45639593. The reversal of 45639591 is 19593654.

It is an interprime number because it is at equal distance from previous prime (45639589) and next prime (45639593).

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

It is not a de Polignac number, because 45639591 - 2¹ = 45639589 is a prime.

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 congruent number.

It is not an unprimeable number, because it can be changed into a prime (45639593) 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, 262210 + ... + 262383.

It is an arithmetic number, because the mean of its divisors is an integer number (7868910).

Almost surely, 2^45639591 is an apocalyptic number.

45639591 is a deficient number, since it is larger than the sum of its proper divisors (17311689).

45639591 is a wasteful number, since it uses less digits than its factorization.

45639591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 524625.

The product of its digits is 145800, while the sum is 42.

The square root of 45639591 is about 6755.7080309913. The cubic root of 45639591 is about 357.3665624226.

The spelling of 45639591 in words is "forty-five million, six hundred thirty-nine thousand, five hundred ninety-one".