61659449 has 8 divisors (see below), whose sum is σ = 63535752. Its totient is φ = 59800960.

The previous prime is 61659443. The next prime is 61659457. The reversal of 61659449 is 94495616.

It can be written as a sum of positive squares in 4 ways, for example, as 319225 + 61340224 = 565^2 + 7832^2 .

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

It is not a de Polignac number, because 61659449 - 2²⁰ = 60610873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61659443) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2747 + ... + 11439.

It is an arithmetic number, because the mean of its divisors is an integer number (7941969).

Almost surely, 2^61659449 is an apocalyptic number.

It is an amenable number.

61659449 is a deficient number, since it is larger than the sum of its proper divisors (1876303).

61659449 is a wasteful number, since it uses less digits than its factorization.

61659449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8907.

The product of its digits is 233280, while the sum is 44.

The square root of 61659449 is about 7852.3530868142. The cubic root of 61659449 is about 395.0631720787.

The spelling of 61659449 in words is "sixty-one million, six hundred fifty-nine thousand, four hundred forty-nine".