641320300523 has 4 divisors (see below), whose sum is σ = 732937486320. Its totient is φ = 549703114728.

The previous prime is 641320300507. The next prime is 641320300609. The reversal of 641320300523 is 325003023146.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 641320300523 - 2⁴ = 641320300507 is a prime.

It is a super-2 number, since 2×641320300523² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (641320302523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45808592888 + ... + 45808592901.

It is an arithmetic number, because the mean of its divisors is an integer number (183234371580).

Almost surely, 2^641320300523 is an apocalyptic number.

641320300523 is a deficient number, since it is larger than the sum of its proper divisors (91617185797).

641320300523 is an equidigital number, since it uses as much as digits as its factorization.

641320300523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91617185796.

The product of its (nonzero) digits is 12960, while the sum is 29.

Adding to 641320300523 its reverse (325003023146), we get a palindrome (966323323669).

The spelling of 641320300523 in words is "six hundred forty-one billion, three hundred twenty million, three hundred thousand, five hundred twenty-three".