45381663 has 6 divisors (see below), whose sum is σ = 65551304. Its totient is φ = 30254436.

The previous prime is 45381631. The next prime is 45381667. The reversal of 45381663 is 36618354.

It is not a de Polignac number, because 45381663 - 2⁵ = 45381631 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45381667) 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, 2521195 + ... + 2521212.

Almost surely, 2^45381663 is an apocalyptic number.

45381663 is a deficient number, since it is larger than the sum of its proper divisors (20169641).

45381663 is a wasteful number, since it uses less digits than its factorization.

45381663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5042413 (or 5042410 counting only the distinct ones).

The product of its digits is 51840, while the sum is 36.

The square root of 45381663 is about 6736.5913487460. The cubic root of 45381663 is about 356.6920820196.

The spelling of 45381663 in words is "forty-five million, three hundred eighty-one thousand, six hundred sixty-three".