42505650009 has 6 divisors (see below), whose sum is σ = 61397050026. Its totient is φ = 28337100000.

The previous prime is 42505649993. The next prime is 42505650053. The reversal of 42505650009 is 90005650524.

42505650009 is a `hidden beast` number, since 42 + 50 + 565 + 0 + 0 + 0 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 26610744384 + 15894905625 = 163128^2 + 126075^2 .

It is not a de Polignac number, because 42505650009 - 2⁴ = 42505649993 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42505650809) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2361424992 + ... + 2361425009.

It is an arithmetic number, because the mean of its divisors is an integer number (10232841671).

Almost surely, 2^42505650009 is an apocalyptic number.

It is an amenable number.

42505650009 is a deficient number, since it is larger than the sum of its proper divisors (18891400017).

42505650009 is a wasteful number, since it uses less digits than its factorization.

42505650009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4722850007 (or 4722850004 counting only the distinct ones).

The product of its (nonzero) digits is 54000, while the sum is 36.

The spelling of 42505650009 in words is "forty-two billion, five hundred five million, six hundred fifty thousand, nine".