61530646 has 4 divisors (see below), whose sum is σ = 92295972. Its totient is φ = 30765322.

The previous prime is 61530613. The next prime is 61530653. The reversal of 61530646 is 64603516.

61530646 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

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 as a sum of consecutive naturals, namely, 15382660 + ... + 15382663.

It is an arithmetic number, because the mean of its divisors is an integer number (23073993).

Almost surely, 2^61530646 is an apocalyptic number.

61530646 is a deficient number, since it is larger than the sum of its proper divisors (30765326).

61530646 is a wasteful number, since it uses less digits than its factorization.

61530646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30765325.

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 61530646 is about 7844.1472449209. The cubic root of 61530646 is about 394.7878923181.

The spelling of 61530646 in words is "sixty-one million, five hundred thirty thousand, six hundred forty-six".