61630385 has 8 divisors (see below), whose sum is σ = 74385000. Its totient is φ = 49018624.

The previous prime is 61630351. The next prime is 61630411. The reversal of 61630385 is 58303616.

It can be written as a sum of positive squares in 4 ways, for example, as 33825856 + 27804529 = 5816^2 + 5273^2 .

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 61630385 - 2¹² = 61626289 is a prime.

It is an alternating number because its digits alternate between even and odd.

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, 34760 + ... + 36489.

It is an arithmetic number, because the mean of its divisors is an integer number (9298125).

Almost surely, 2^61630385 is an apocalyptic number.

It is an amenable number.

61630385 is a deficient number, since it is larger than the sum of its proper divisors (12754615).

61630385 is a wasteful number, since it uses less digits than its factorization.

61630385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71427.

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 61630385 is about 7850.5022132345. The cubic root of 61630385 is about 395.0010895660.

The spelling of 61630385 in words is "sixty-one million, six hundred thirty thousand, three hundred eighty-five".