45561691 has 4 divisors (see below), whose sum is σ = 52070512. Its totient is φ = 39052872.

The previous prime is 45561671. The next prime is 45561727. The reversal of 45561691 is 19616554.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 45561691 - 2²¹ = 43464539 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 45561691.

It is not an unprimeable number, because it can be changed into a prime (45561671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3254400 + ... + 3254413.

It is an arithmetic number, because the mean of its divisors is an integer number (13017628).

Almost surely, 2^45561691 is an apocalyptic number.

45561691 is a deficient number, since it is larger than the sum of its proper divisors (6508821).

45561691 is an equidigital number, since it uses as much as digits as its factorization.

45561691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6508820.

The product of its digits is 32400, while the sum is 37.

The square root of 45561691 is about 6749.9400738081. The cubic root of 45561691 is about 357.1631227586.

The spelling of 45561691 in words is "forty-five million, five hundred sixty-one thousand, six hundred ninety-one".