641172671775 has 144 divisors (see below), whose sum is σ = 1206050040000. Its totient is φ = 325188864000.

The previous prime is 641172671749. The next prime is 641172671779. The reversal of 641172671775 is 577176271146.

It is not a de Polignac number, because 641172671775 - 2⁷ = 641172671647 is a prime.

It is a super-2 number, since 2×641172671775² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641172671779) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 131143531 + ... + 131148419.

It is an arithmetic number, because the mean of its divisors is an integer number (8375347500).

Almost surely, 2^641172671775 is an apocalyptic number.

641172671775 is a deficient number, since it is larger than the sum of its proper divisors (564877368225).

641172671775 is a wasteful number, since it uses less digits than its factorization.

641172671775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5234 (or 5226 counting only the distinct ones).

The product of its digits is 3457440, while the sum is 54.

The spelling of 641172671775 in words is "six hundred forty-one billion, one hundred seventy-two million, six hundred seventy-one thousand, seven hundred seventy-five".