641006521646 has 8 divisors (see below), whose sum is σ = 984961240704. Its totient is φ = 312686108080.

The previous prime is 641006521619. The next prime is 641006521667. The reversal of 641006521646 is 646125600146.

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

It is a Harshad number since it is a multiple of its sum of digits (41).

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, 3908576270 + ... + 3908576433.

It is an arithmetic number, because the mean of its divisors is an integer number (123120155088).

Almost surely, 2^641006521646 is an apocalyptic number.

641006521646 is a deficient number, since it is larger than the sum of its proper divisors (343954719058).

641006521646 is a wasteful number, since it uses less digits than its factorization.

641006521646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7817152746.

The product of its (nonzero) digits is 207360, while the sum is 41.

The spelling of 641006521646 in words is "six hundred forty-one billion, six million, five hundred twenty-one thousand, six hundred forty-six".