61649216 has 28 divisors (see below), whose sum is σ = 122651520. Its totient is φ = 30744960.

The previous prime is 61649213. The next prime is 61649233. The reversal of 61649216 is 61294616.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61649213) 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, 29651 + ... + 31661.

Almost surely, 2^61649216 is an apocalyptic number.

It is an amenable number.

61649216 is a deficient number, since it is larger than the sum of its proper divisors (61002304).

61649216 is a wasteful number, since it uses less digits than its factorization.

61649216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2502 (or 2492 counting only the distinct ones).

The product of its digits is 15552, while the sum is 35.

The square root of 61649216 is about 7851.7014716557. The cubic root of 61649216 is about 395.0413159795.

The spelling of 61649216 in words is "sixty-one million, six hundred forty-nine thousand, two hundred sixteen".