641325855347520 has 896 divisors, whose sum is σ = 2490263876911104. Its totient is φ = 136495456321536.

The previous prime is 641325855347449. The next prime is 641325855347543. The reversal of 641325855347520 is 25743558523146.

It is a super-2 number, since 2×641325855347520² (a number of 30 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 37753912467 + ... + 37753929453.

It is an arithmetic number, because the mean of its divisors is an integer number (2779312362624).

Almost surely, 2^{641325855347520} is an apocalyptic number.

641325855347520 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 641325855347520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1245131938455552).

641325855347520 is an abundant number, since it is smaller than the sum of its proper divisors (1848938021563584).

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

641325855347520 is a wasteful number, since it uses less digits than its factorization.

641325855347520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20535 (or 20525 counting only the distinct ones).

The product of its (nonzero) digits is 120960000, while the sum is 60.

The spelling of 641325855347520 in words is "six hundred forty-one trillion, three hundred twenty-five billion, eight hundred fifty-five million, three hundred forty-seven thousand, five hundred twenty".