61347605447 has 4 divisors (see below), whose sum is σ = 62652873696. Its totient is φ = 60042337200.

The previous prime is 61347605437. The next prime is 61347605519. The reversal of 61347605447 is 74450674316.

61347605447 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 61347605447 - 2⁶ = 61347605383 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (47), and also a Moran number because the ratio is a prime number: 1305268201 = 61347605447 / (6 + 1 + 3 + 4 + 7 + 6 + 0 + 5 + 4 + 4 + 7).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61347605437) 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, 652634054 + ... + 652634147.

It is an arithmetic number, because the mean of its divisors is an integer number (15663218424).

Almost surely, 2^61347605447 is an apocalyptic number.

61347605447 is a deficient number, since it is larger than the sum of its proper divisors (1305268249).

61347605447 is a wasteful number, since it uses less digits than its factorization.

61347605447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1305268248.

The product of its (nonzero) digits is 1693440, while the sum is 47.

The spelling of 61347605447 in words is "sixty-one billion, three hundred forty-seven million, six hundred five thousand, four hundred forty-seven".