641878163708 has 12 divisors (see below), whose sum is σ = 1149409735320. Its totient is φ = 313475382192.

The previous prime is 641878163699. The next prime is 641878163753. The reversal of 641878163708 is 807361878146.

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, 1865924723 + ... + 1865925066.

It is an arithmetic number, because the mean of its divisors is an integer number (95784144610).

Almost surely, 2^641878163708 is an apocalyptic number.

It is an amenable number.

641878163708 is a deficient number, since it is larger than the sum of its proper divisors (507531571612).

641878163708 is a wasteful number, since it uses less digits than its factorization.

641878163708 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3731849836 (or 3731849834 counting only the distinct ones).

The product of its (nonzero) digits is 10838016, while the sum is 59.

The spelling of 641878163708 in words is "six hundred forty-one billion, eight hundred seventy-eight million, one hundred sixty-three thousand, seven hundred eight".