641216100425 has 6 divisors (see below), whose sum is σ = 795107964558. Its totient is φ = 512972880320.

The previous prime is 641216100379. The next prime is 641216100433. The reversal of 641216100425 is 524001612146.

It can be written as a sum of positive squares in 3 ways, for example, as 46133455369 + 595082645056 = 214787^2 + 771416^2 .

It is not a de Polignac number, because 641216100425 - 2²⁰ = 641215051849 is a prime.

It is a super-2 number, since 2×641216100425² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 641216100391 and 641216100400.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12824321984 + ... + 12824322033.

It is an arithmetic number, because the mean of its divisors is an integer number (132517994093).

Almost surely, 2^641216100425 is an apocalyptic number.

It is an amenable number.

641216100425 is a deficient number, since it is larger than the sum of its proper divisors (153891864133).

641216100425 is a wasteful number, since it uses less digits than its factorization.

641216100425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25648644027 (or 25648644022 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 32.

The spelling of 641216100425 in words is "six hundred forty-one billion, two hundred sixteen million, one hundred thousand, four hundred twenty-five".