45385781 has 4 divisors (see below), whose sum is σ = 51869472. Its totient is φ = 38902092.

The previous prime is 45385759. The next prime is 45385787. The reversal of 45385781 is 18758354.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 45385781 - 2²² = 41191477 is a prime.

It is a super-2 number, since 2×45385781² = 4119738233959922, 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 (45385787) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3241835 + ... + 3241848.

It is an arithmetic number, because the mean of its divisors is an integer number (12967368).

Almost surely, 2^45385781 is an apocalyptic number.

It is an amenable number.

45385781 is a deficient number, since it is larger than the sum of its proper divisors (6483691).

45385781 is an equidigital number, since it uses as much as digits as its factorization.

45385781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6483690.

The product of its digits is 134400, while the sum is 41.

The square root of 45385781 is about 6736.8969860018. The cubic root of 45385781 is about 356.7028706177.

The spelling of 45385781 in words is "forty-five million, three hundred eighty-five thousand, seven hundred eighty-one".