4545649381 has 16 divisors (see below), whose sum is σ = 5775121408. Its totient is φ = 3480537600.

The previous prime is 4545649351. The next prime is 4545649387. The reversal of 4545649381 is 1839465454.

4545649381 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 4545649381 - 2⁹ = 4545648869 is a prime.

It is a super-2 number, since 2×4545649381² = 41325856589971366322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4545649387) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 802860 + ... + 808501.

It is an arithmetic number, because the mean of its divisors is an integer number (360945088).

Almost surely, 2^4545649381 is an apocalyptic number.

It is an amenable number.

4545649381 is a deficient number, since it is larger than the sum of its proper divisors (1229472027).

4545649381 is a wasteful number, since it uses less digits than its factorization.

4545649381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1611412.

The product of its digits is 2073600, while the sum is 49.

The square root of 4545649381 is about 67421.4311699181. The cubic root of 4545649381 is about 1656.5274800487.

The spelling of 4545649381 in words is "four billion, five hundred forty-five million, six hundred forty-nine thousand, three hundred eighty-one".