641596498521408 has 336 divisors, whose sum is σ = 1952872646122944. Its totient is φ = 201112778465280.

The previous prime is 641596498521379. The next prime is 641596498521509. The reversal of 641596498521408 is 804125894695146.

641596498521408 is a `hidden beast` number, since 6 + 4 + 1 + 5 + 9 + 6 + 4 + 98 + 521 + 4 + 0 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 90064591 + ... + 96926897.

It is an arithmetic number, because the mean of its divisors is an integer number (5812120970604).

Almost surely, 2^{641596498521408} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 641596498521408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (976436323061472).

641596498521408 is an abundant number, since it is smaller than the sum of its proper divisors (1311276147601536).

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

641596498521408 is a wasteful number, since it uses less digits than its factorization.

641596498521408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6862510 (or 6862497 counting only the distinct ones).

The product of its (nonzero) digits is 597196800, while the sum is 72.

The spelling of 641596498521408 in words is "six hundred forty-one trillion, five hundred ninety-six billion, four hundred ninety-eight million, five hundred twenty-one thousand, four hundred eight".