641404625406313 has 4 divisors (see below), whose sum is σ = 641407260804688. Its totient is φ = 641401990007940.

The previous prime is 641404625406287. The next prime is 641404625406319. The reversal of 641404625406313 is 313604526404146.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 641404625406313 - 2⁹ = 641404625405801 is a prime.

It is a super-2 number, since 2×641404625406313² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (641404625406319) 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, 1317334083 + ... + 1317820888.

It is an arithmetic number, because the mean of its divisors is an integer number (160351815201172).

Almost surely, 2^{641404625406313} is an apocalyptic number.

It is an amenable number.

641404625406313 is a deficient number, since it is larger than the sum of its proper divisors (2635398375).

641404625406313 is a wasteful number, since it uses less digits than its factorization.

641404625406313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2635398374.

The product of its (nonzero) digits is 4976640, while the sum is 49.

The spelling of 641404625406313 in words is "six hundred forty-one trillion, four hundred four billion, six hundred twenty-five million, four hundred six thousand, three hundred thirteen".