61649316 has 24 divisors (see below), whose sum is σ = 159831840. Its totient is φ = 20549736.

The previous prime is 61649267. The next prime is 61649431. The reversal of 61649316 is 61394616.

61649316 is a `hidden beast` number, since 6 + 1 + 649 + 3 + 1 + 6 = 666.

61649316 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 285306 + ... + 285521.

It is an arithmetic number, because the mean of its divisors is an integer number (6659660).

Almost surely, 2^61649316 is an apocalyptic number.

It is an amenable number.

61649316 is an abundant number, since it is smaller than the sum of its proper divisors (98182524).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61649316 is a wasteful number, since it uses less digits than its factorization.

61649316 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 570840 (or 570832 counting only the distinct ones).

The product of its digits is 23328, while the sum is 36.

The square root of 61649316 is about 7851.7078396996. The cubic root of 61649316 is about 395.0415295757.

The spelling of 61649316 in words is "sixty-one million, six hundred forty-nine thousand, three hundred sixteen".