45161720 has 16 divisors (see below), whose sum is σ = 101613960. Its totient is φ = 18064672.

The previous prime is 45161681. The next prime is 45161723. The reversal of 45161720 is 2716154.

45161720 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 45161720.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45161723) 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, 564482 + ... + 564561.

Almost surely, 2^45161720 is an apocalyptic number.

45161720 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

45161720 is an abundant number, since it is smaller than the sum of its proper divisors (56452240).

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

45161720 is a wasteful number, since it uses less digits than its factorization.

45161720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1129054 (or 1129050 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 45161720 is about 6720.2470192695. The cubic root of 45161720 is about 356.1149105126.

Adding to 45161720 its reverse (2716154), we get a palindrome (47877874).

The spelling of 45161720 in words is "forty-five million, one hundred sixty-one thousand, seven hundred twenty".