641716296418 has 4 divisors (see below), whose sum is σ = 962574444630. Its totient is φ = 320858148208.

The previous prime is 641716296401. The next prime is 641716296511. The reversal of 641716296418 is 814692617146.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 386718565689 + 254997730729 = 621867^2 + 504973^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160429074103 + ... + 160429074106.

Almost surely, 2^641716296418 is an apocalyptic number.

641716296418 is a deficient number, since it is larger than the sum of its proper divisors (320858148212).

641716296418 is a wasteful number, since it uses less digits than its factorization.

641716296418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 320858148211.

The product of its digits is 3483648, while the sum is 55.

The spelling of 641716296418 in words is "six hundred forty-one billion, seven hundred sixteen million, two hundred ninety-six thousand, four hundred eighteen".