61447716 has 36 divisors (see below), whose sum is σ = 169447824. Its totient is φ = 18620400.

The previous prime is 61447709. The next prime is 61447717. The reversal of 61447716 is 61774416.

61447716 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (61447717) 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, 77190 + ... + 77981.

It is an arithmetic number, because the mean of its divisors is an integer number (4706884).

Almost surely, 2^61447716 is an apocalyptic number.

61447716 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

61447716 is an abundant number, since it is smaller than the sum of its proper divisors (108000108).

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

61447716 is a wasteful number, since it uses less digits than its factorization.

61447716 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155192 (or 155187 counting only the distinct ones).

The product of its digits is 28224, while the sum is 36.

The square root of 61447716 is about 7838.8593557992. The cubic root of 61447716 is about 394.6104496844.

The spelling of 61447716 in words is "sixty-one million, four hundred forty-seven thousand, seven hundred sixteen".