641256062345 has 8 divisors (see below), whose sum is σ = 775124117064. Its totient is φ = 509260288384.

The previous prime is 641256062309. The next prime is 641256062347. The reversal of 641256062345 is 543260652146.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 3641036281 + 637615026064 = 60341^2 + 798508^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 641256062345 - 2⁸ = 641256062089 is a prime.

It is a super-2 number, since 2×641256062345² (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 = 641256062296 and 641256062305.

It is not an unprimeable number, because it can be changed into a prime (641256062347) 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 7 ways as a sum of consecutive naturals, for example, 468069434 + ... + 468070803.

It is an arithmetic number, because the mean of its divisors is an integer number (96890514633).

Almost surely, 2^641256062345 is an apocalyptic number.

It is an amenable number.

641256062345 is a deficient number, since it is larger than the sum of its proper divisors (133868054719).

641256062345 is a wasteful number, since it uses less digits than its factorization.

641256062345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 936140379.

The product of its (nonzero) digits is 1036800, while the sum is 44.

The spelling of 641256062345 in words is "six hundred forty-one billion, two hundred fifty-six million, sixty-two thousand, three hundred forty-five".