45645520 has 20 divisors (see below), whose sum is σ = 106126020. Its totient is φ = 18258176.

The previous prime is 45645517. The next prime is 45645521. The reversal of 45645520 is 2554654.

It can be written as a sum of positive squares in 2 ways, for example, as 24522304 + 21123216 = 4952^2 + 4596^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45645521) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 285205 + ... + 285364.

It is an arithmetic number, because the mean of its divisors is an integer number (5306301).

Almost surely, 2^45645520 is an apocalyptic number.

45645520 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

45645520 is an abundant number, since it is smaller than the sum of its proper divisors (60480500).

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

45645520 is a wasteful number, since it uses less digits than its factorization.

45645520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 570582 (or 570576 counting only the distinct ones).

The product of its (nonzero) digits is 24000, while the sum is 31.

The square root of 45645520 is about 6756.1468308497. The cubic root of 45645520 is about 357.3820368135.

The spelling of 45645520 in words is "forty-five million, six hundred forty-five thousand, five hundred twenty".