641913295686 has 256 divisors, whose sum is σ = 1493684527104. Its totient is φ = 182476800000.

The previous prime is 641913295679. The next prime is 641913295687. The reversal of 641913295686 is 686592319146.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641913295687) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 1600781086 + ... + 1600781486.

It is an arithmetic number, because the mean of its divisors is an integer number (5834705184).

Almost surely, 2^641913295686 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 641913295686, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (746842263552).

641913295686 is an abundant number, since it is smaller than the sum of its proper divisors (851771231418).

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

641913295686 is a wasteful number, since it uses less digits than its factorization.

641913295686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 799.

The product of its digits is 16796160, while the sum is 60.

The spelling of 641913295686 in words is "six hundred forty-one billion, nine hundred thirteen million, two hundred ninety-five thousand, six hundred eighty-six".