42621661611266 has 32 divisors (see below), whose sum is σ = 67765994755200. Its totient is φ = 20069429806720.

The previous prime is 42621661611253. The next prime is 42621661611283. The reversal of 42621661611266 is 66211616612624.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8092595 + ... + 12277353.

It is an arithmetic number, because the mean of its divisors is an integer number (2117687336100).

Almost surely, 2^{42621661611266} is an apocalyptic number.

42621661611266 is a deficient number, since it is larger than the sum of its proper divisors (25144333143934).

42621661611266 is a wasteful number, since it uses less digits than its factorization.

42621661611266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4189114.

The product of its digits is 1492992, while the sum is 50.

The spelling of 42621661611266 in words is "forty-two trillion, six hundred twenty-one billion, six hundred sixty-one million, six hundred eleven thousand, two hundred sixty-six".