61448643 has 12 divisors (see below), whose sum is σ = 89356800. Its totient is φ = 40689936.

The previous prime is 61448633. The next prime is 61448657. The reversal of 61448643 is 34684416.

61448643 is a `hidden beast` number, since 6 + 1 + 4 + 4 + 8 + 643 = 666.

61448643 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 61448643 - 2⁶ = 61448579 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 61448598 and 61448607.

It is not an unprimeable number, because it can be changed into a prime (61448623) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 21571 + ... + 24252.

It is an arithmetic number, because the mean of its divisors is an integer number (7446400).

Almost surely, 2^61448643 is an apocalyptic number.

61448643 is a deficient number, since it is larger than the sum of its proper divisors (27908157).

61448643 is a wasteful number, since it uses less digits than its factorization.

61448643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45978 (or 45975 counting only the distinct ones).

The product of its digits is 55296, while the sum is 36.

The square root of 61448643 is about 7838.9184840767. The cubic root of 61448643 is about 394.6124340383.

The spelling of 61448643 in words is "sixty-one million, four hundred forty-eight thousand, six hundred forty-three".