641404237651144 has 16 divisors (see below), whose sum is σ = 1311963213377520. Its totient is φ = 291547380750480.

The previous prime is 641404237651141. The next prime is 641404237651153. The reversal of 641404237651144 is 441156732404146.

It is a super-2 number, since 2×641404237651144² (a number of 30 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 641404237651091 and 641404237651100.

It is not an unprimeable number, because it can be changed into a prime (641404237651141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3644342259294 + ... + 3644342259469.

It is an arithmetic number, because the mean of its divisors is an integer number (81997700836095).

Almost surely, 2^{641404237651144} is an apocalyptic number.

It is an amenable number.

641404237651144 is an abundant number, since it is smaller than the sum of its proper divisors (670558975726376).

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

641404237651144 is a wasteful number, since it uses less digits than its factorization.

641404237651144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7288684518780 (or 7288684518776 counting only the distinct ones).

The product of its (nonzero) digits is 7741440, while the sum is 52.

The spelling of 641404237651144 in words is "six hundred forty-one trillion, four hundred four billion, two hundred thirty-seven million, six hundred fifty-one thousand, one hundred forty-four".