543640449 has 16 divisors (see below), whose sum is σ = 791331840. Its totient is φ = 329236560.

The previous prime is 543640429. The next prime is 543640457. The reversal of 543640449 is 944046345.

It is not a de Polignac number, because 543640449 - 2¹⁷ = 543509377 is a prime.

It is not an unprimeable number, because it can be changed into a prime (543640429) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46164 + ... + 56730.

It is an arithmetic number, because the mean of its divisors is an integer number (49458240).

Almost surely, 2^543640449 is an apocalyptic number.

It is an amenable number.

543640449 is a deficient number, since it is larger than the sum of its proper divisors (247691391).

543640449 is a wasteful number, since it uses less digits than its factorization.

543640449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12140.

The product of its (nonzero) digits is 207360, while the sum is 39.

The square root of 543640449 is about 23316.0984943879. The cubic root of 543640449 is about 816.1511323178.

The spelling of 543640449 in words is "five hundred forty-three million, six hundred forty thousand, four hundred forty-nine".