641017941976 has 16 divisors (see below), whose sum is σ = 1201917158640. Its totient is φ = 320506699680.

The previous prime is 641017941973. The next prime is 641017941983. The reversal of 641017941976 is 679149710146.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641017941973) 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 3 ways as a sum of consecutive naturals, for example, 1943146 + ... + 2248966.

It is an arithmetic number, because the mean of its divisors is an integer number (75119822415).

Almost surely, 2^641017941976 is an apocalyptic number.

It is an amenable number.

641017941976 is a deficient number, since it is larger than the sum of its proper divisors (560899216664).

641017941976 is a wasteful number, since it uses less digits than its factorization.

641017941976 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 567834 (or 567830 counting only the distinct ones).

The product of its (nonzero) digits is 2286144, while the sum is 55.

The spelling of 641017941976 in words is "six hundred forty-one billion, seventeen million, nine hundred forty-one thousand, nine hundred seventy-six".