641691037033488 has 320 divisors, whose sum is σ = 2049896364902400. Its totient is φ = 190856336209920.

The previous prime is 641691037033441. The next prime is 641691037033499. The reversal of 641691037033488 is 884330730196146.

It is a happy number.

641691037033488 is a `hidden beast` number, since 6 + 4 + 1 + 6 + 91 + 0 + 37 + 0 + 33 + 488 = 666.

It is a super-2 number, since 2×641691037033488² (a number of 30 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 150580798 + ... + 154783586.

It is an arithmetic number, because the mean of its divisors is an integer number (6405926140320).

Almost surely, 2^{641691037033488} 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 641691037033488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1024948182451200).

641691037033488 is an abundant number, since it is smaller than the sum of its proper divisors (1408205327868912).

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

641691037033488 is a wasteful number, since it uses less digits than its factorization.

641691037033488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4203727 (or 4203715 counting only the distinct ones).

The product of its (nonzero) digits is 62705664, while the sum is 63.

The spelling of 641691037033488 in words is "six hundred forty-one trillion, six hundred ninety-one billion, thirty-seven million, thirty-three thousand, four hundred eighty-eight".