49564809 has 24 divisors (see below), whose sum is σ = 86636160. Its totient is φ = 26656128.

The previous prime is 49564789. The next prime is 49564811. The reversal of 49564809 is 90846594.

It is a happy number.

49564809 is a `hidden beast` number, since 4 + 9 + 564 + 80 + 9 = 666.

It is not a de Polignac number, because 49564809 - 2⁸ = 49564553 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49560809) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 22069 + ... + 24210.

It is an arithmetic number, because the mean of its divisors is an integer number (3609840).

Almost surely, 2^49564809 is an apocalyptic number.

It is an amenable number.

49564809 is a deficient number, since it is larger than the sum of its proper divisors (37071351).

49564809 is a wasteful number, since it uses less digits than its factorization.

49564809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46309 (or 46306 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 45.

The square root of 49564809 is about 7040.2279082427. The cubic root of 49564809 is about 367.3311955553.

The spelling of 49564809 in words is "forty-nine million, five hundred sixty-four thousand, eight hundred nine".