641556222655145 has 8 divisors (see below), whose sum is σ = 879848533927104. Its totient is φ = 439924266963504.

The previous prime is 641556222655141. The next prime is 641556222655147. The reversal of 641556222655145 is 541556222655146.

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

It is a cyclic number.

It is not a de Polignac number, because 641556222655145 - 2² = 641556222655141 is a prime.

It is not an unprimeable number, because it can be changed into a prime (641556222655141) 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, 9165088895039 + ... + 9165088895108.

It is an arithmetic number, because the mean of its divisors is an integer number (109981066740888).

Almost surely, 2^{641556222655145} is an apocalyptic number.

It is an amenable number.

641556222655145 is a deficient number, since it is larger than the sum of its proper divisors (238292311271959).

641556222655145 is a wasteful number, since it uses less digits than its factorization.

641556222655145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18330177790159.

The product of its digits is 86400000, while the sum is 59.

Subtracting from 641556222655145 its reverse (541556222655146), we obtain a palindrome (99999999999999).

The spelling of 641556222655145 in words is "six hundred forty-one trillion, five hundred fifty-six billion, two hundred twenty-two million, six hundred fifty-five thousand, one hundred forty-five".