42655621505 has 16 divisors (see below), whose sum is σ = 59743802880. Its totient is φ = 28627236672.

The previous prime is 42655621501. The next prime is 42655621507. The reversal of 42655621505 is 50512655624.

It is a cyclic number.

It is not a de Polignac number, because 42655621505 - 2² = 42655621501 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42655621501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12963590 + ... + 12966879.

It is an arithmetic number, because the mean of its divisors is an integer number (3733987680).

Almost surely, 2^42655621505 is an apocalyptic number.

It is an amenable number.

42655621505 is a deficient number, since it is larger than the sum of its proper divisors (17088181375).

42655621505 is a wasteful number, since it uses less digits than its factorization.

42655621505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25930528.

The product of its (nonzero) digits is 360000, while the sum is 41.

The spelling of 42655621505 in words is "forty-two billion, six hundred fifty-five million, six hundred twenty-one thousand, five hundred five".