641352771078 has 8 divisors (see below), whose sum is σ = 1282705542168. Its totient is φ = 213784257024.

The previous prime is 641352771061. The next prime is 641352771083. The reversal of 641352771078 is 870177253146.

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

641352771078 is an admirable number.

It is a super-2 number, since 2×641352771078² (a number of 24 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 641352771078.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53446064251 + ... + 53446064262.

It is an arithmetic number, because the mean of its divisors is an integer number (160338192771).

Almost surely, 2^641352771078 is an apocalyptic number.

641352771078 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

641352771078 is a wasteful number, since it uses less digits than its factorization.

641352771078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106892128518.

The product of its (nonzero) digits is 1975680, while the sum is 51.

The spelling of 641352771078 in words is "six hundred forty-one billion, three hundred fifty-two million, seven hundred seventy-one thousand, seventy-eight".