61649305 has 8 divisors (see below), whose sum is σ = 74102400. Its totient is φ = 49237296.

The previous prime is 61649267. The next prime is 61649431. The reversal of 61649305 is 50394616.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 61649305 - 2¹⁵ = 61616537 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6865 + ... + 13054.

It is an arithmetic number, because the mean of its divisors is an integer number (9262800).

Almost surely, 2^61649305 is an apocalyptic number.

It is an amenable number.

61649305 is a deficient number, since it is larger than the sum of its proper divisors (12453095).

61649305 is a wasteful number, since it uses less digits than its factorization.

61649305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20543.

The product of its (nonzero) digits is 19440, while the sum is 34.

The square root of 61649305 is about 7851.7071392150. The cubic root of 61649305 is about 395.0415060801.

The spelling of 61649305 in words is "sixty-one million, six hundred forty-nine thousand, three hundred five".