653449678 has 16 divisors (see below), whose sum is σ = 1121837184. Its totient is φ = 279640440.

The previous prime is 653449673. The next prime is 653449679. The reversal of 653449678 is 876944356.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (653449673) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24100 + ... + 43447.

It is an arithmetic number, because the mean of its divisors is an integer number (70114824).

Almost surely, 2^653449678 is an apocalyptic number.

653449678 is a deficient number, since it is larger than the sum of its proper divisors (468387506).

653449678 is a wasteful number, since it uses less digits than its factorization.

653449678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68247.

The product of its digits is 4354560, while the sum is 52.

The square root of 653449678 is about 25562.6617941090. The cubic root of 653449678 is about 867.7688361680.

The spelling of 653449678 in words is "six hundred fifty-three million, four hundred forty-nine thousand, six hundred seventy-eight".