641777117170 has 32 divisors (see below), whose sum is σ = 1320270069888. Its totient is φ = 220030725888.

The previous prime is 641777117147. The next prime is 641777117173. The reversal of 641777117170 is 71711777146.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (641777117173) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2311429 + ... + 2574151.

It is an arithmetic number, because the mean of its divisors is an integer number (41258439684).

Almost surely, 2^641777117170 is an apocalyptic number.

641777117170 is an abundant number, since it is smaller than the sum of its proper divisors (678492952718).

641777117170 is a wasteful number, since it uses less digits than its factorization.

641777117170 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 297634.

The product of its (nonzero) digits is 403368, while the sum is 49.

The spelling of 641777117170 in words is "six hundred forty-one billion, seven hundred seventy-seven million, one hundred seventeen thousand, one hundred seventy".