61071005447 has 4 divisors (see below), whose sum is σ = 61071866256. Its totient is φ = 61070144640.

The previous prime is 61071005407. The next prime is 61071005509. The reversal of 61071005447 is 74450017016.

It is a happy number.

61071005447 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 61071005447 - 2²⁸ = 60802569991 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61071005407) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 313379 + ... + 469412.

It is an arithmetic number, because the mean of its divisors is an integer number (15267966564).

Almost surely, 2^61071005447 is an apocalyptic number.

61071005447 is a deficient number, since it is larger than the sum of its proper divisors (860809).

61071005447 is an equidigital number, since it uses as much as digits as its factorization.

61071005447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 860808.

The product of its (nonzero) digits is 23520, while the sum is 35.

The spelling of 61071005447 in words is "sixty-one billion, seventy-one million, five thousand, four hundred forty-seven".