45620181 has 6 divisors (see below), whose sum is σ = 65895830. Its totient is φ = 30413448.

The previous prime is 45620177. The next prime is 45620191. The reversal of 45620181 is 18102654.

45620181 is a `hidden beast` number, since 456 + 201 + 8 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 35640900 + 9979281 = 5970^2 + 3159^2 .

It is not a de Polignac number, because 45620181 - 2² = 45620177 is a prime.

It is a super-2 number, since 2×45620181² = 4162401828945522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45620101) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2534446 + ... + 2534463.

Almost surely, 2^45620181 is an apocalyptic number.

It is an amenable number.

45620181 is a deficient number, since it is larger than the sum of its proper divisors (20275649).

45620181 is a wasteful number, since it uses less digits than its factorization.

45620181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5068915 (or 5068912 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 45620181 is about 6754.2713152493. The cubic root of 45620181 is about 357.3158939249.

The spelling of 45620181 in words is "forty-five million, six hundred twenty thousand, one hundred eighty-one".