61448109 has 16 divisors (see below), whose sum is σ = 86592000. Its totient is φ = 38652336.

The previous prime is 61448077. The next prime is 61448113. The reversal of 61448109 is 90184416.

It is not a de Polignac number, because 61448109 - 2⁵ = 61448077 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 61448109.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61448119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12942 + ... + 17040.

It is an arithmetic number, because the mean of its divisors is an integer number (5412000).

Almost surely, 2^61448109 is an apocalyptic number.

It is an amenable number.

61448109 is a deficient number, since it is larger than the sum of its proper divisors (25143891).

61448109 is a wasteful number, since it uses less digits than its factorization.

61448109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4384.

The product of its (nonzero) digits is 6912, while the sum is 33.

The square root of 61448109 is about 7838.8844231817. The cubic root of 61448109 is about 394.6112909501.

The spelling of 61448109 in words is "sixty-one million, four hundred forty-eight thousand, one hundred nine".