61448646 has 48 divisors (see below), whose sum is σ = 146036736. Its totient is φ = 17179344.

The previous prime is 61448633. The next prime is 61448657. The reversal of 61448646 is 64684416.

61448646 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon 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 in 23 ways as a sum of consecutive naturals, for example, 11595 + ... + 16041.

It is an arithmetic number, because the mean of its divisors is an integer number (3042432).

Almost surely, 2^61448646 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61448646, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (73018368).

61448646 is an abundant number, since it is smaller than the sum of its proper divisors (84588090).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61448646 is a wasteful number, since it uses less digits than its factorization.

61448646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4513 (or 4506 counting only the distinct ones).

The product of its digits is 110592, while the sum is 39.

The square root of 61448646 is about 7838.9186754297. The cubic root of 61448646 is about 394.6124404601.

It can be divided in two parts, 6144864 and 6, that multiplied together give a square (36869184 = 6072²).

The spelling of 61448646 in words is "sixty-one million, four hundred forty-eight thousand, six hundred forty-six".