641019813528 has 64 divisors (see below), whose sum is σ = 1635261235200. Its totient is φ = 209350483200.

The previous prime is 641019813523. The next prime is 641019813547. The reversal of 641019813528 is 825318910146.

It is a happy number.

641019813528 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641019813521) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 946968 + ... + 1476071.

It is an arithmetic number, because the mean of its divisors is an integer number (25550956800).

Almost surely, 2^641019813528 is an apocalyptic number.

It is an amenable number.

641019813528 is an abundant number, since it is smaller than the sum of its proper divisors (994241421672).

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

641019813528 is a wasteful number, since it uses less digits than its factorization.

641019813528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2423272 (or 2423268 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 48.

The spelling of 641019813528 in words is "six hundred forty-one billion, nineteen million, eight hundred thirteen thousand, five hundred twenty-eight".