641366063545 has 8 divisors (see below), whose sum is σ = 777259467720. Its totient is φ = 508012723200.

The previous prime is 641366063497. The next prime is 641366063579. The reversal of 641366063545 is 545360663146.

It can be written as a sum of positive squares in 4 ways, for example, as 338966155264 + 302399908281 = 582208^2 + 549909^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 641366063545 - 2⁹ = 641366063033 is a prime.

It is a super-2 number, since 2×641366063545² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 635015400 + ... + 635016409.

It is an arithmetic number, because the mean of its divisors is an integer number (97157433465).

Almost surely, 2^641366063545 is an apocalyptic number.

It is an amenable number.

641366063545 is a deficient number, since it is larger than the sum of its proper divisors (135893404175).

641366063545 is a wasteful number, since it uses less digits than its factorization.

641366063545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1270031915.

The product of its (nonzero) digits is 4665600, while the sum is 49.

The spelling of 641366063545 in words is "six hundred forty-one billion, three hundred sixty-six million, sixty-three thousand, five hundred forty-five".