42147705561 has 8 divisors (see below), whose sum is σ = 60519782400. Its totient is φ = 25937049552.

The previous prime is 42147705547. The next prime is 42147705577. The reversal of 42147705561 is 16550774124.

42147705561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 42147705561 - 2¹⁷ = 42147574489 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42147705581) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 540355161 + ... + 540355238.

It is an arithmetic number, because the mean of its divisors is an integer number (7564972800).

Almost surely, 2^42147705561 is an apocalyptic number.

It is an amenable number.

42147705561 is a deficient number, since it is larger than the sum of its proper divisors (18372076839).

42147705561 is a wasteful number, since it uses less digits than its factorization.

42147705561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1080710415.

The product of its (nonzero) digits is 235200, while the sum is 42.

The spelling of 42147705561 in words is "forty-two billion, one hundred forty-seven million, seven hundred five thousand, five hundred sixty-one".