61649883 has 16 divisors (see below), whose sum is σ = 91455360. Its totient is φ = 41044968.

The previous prime is 61649879. The next prime is 61649891. The reversal of 61649883 is 38894616.

It is not a de Polignac number, because 61649883 - 2² = 61649879 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61649893) 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, 34416 + ... + 36162.

It is an arithmetic number, because the mean of its divisors is an integer number (5715960).

Almost surely, 2^61649883 is an apocalyptic number.

61649883 is a deficient number, since it is larger than the sum of its proper divisors (29805477).

61649883 is a wasteful number, since it uses less digits than its factorization.

61649883 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3063 (or 3057 counting only the distinct ones).

The product of its digits is 248832, while the sum is 45.

The square root of 61649883 is about 7851.7439464109. The cubic root of 61649883 is about 395.0427406617.

The spelling of 61649883 in words is "sixty-one million, six hundred forty-nine thousand, eight hundred eighty-three".