641888888147 has 8 divisors (see below), whose sum is σ = 731927601216. Its totient is φ = 557659124352.

The previous prime is 641888888119. The next prime is 641888888171. The reversal of 641888888147 is 741888888146.

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 641888888147 - 2²⁶ = 641821779283 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (641888888747) 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, 1452237083 + ... + 1452237524.

It is an arithmetic number, because the mean of its divisors is an integer number (91490950152).

Almost surely, 2^641888888147 is an apocalyptic number.

641888888147 is a deficient number, since it is larger than the sum of its proper divisors (90038713069).

641888888147 is a wasteful number, since it uses less digits than its factorization.

641888888147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2904474637.

The product of its digits is 176160768, while the sum is 71.

Subtracting 641888888147 from its reverse (741888888146), we obtain a palindrome (99999999999).

The spelling of 641888888147 in words is "six hundred forty-one billion, eight hundred eighty-eight million, eight hundred eighty-eight thousand, one hundred forty-seven".