64741641641 has 4 divisors (see below), whose sum is σ = 64842643284. Its totient is φ = 64640640000.

The previous prime is 64741641631. The next prime is 64741641689. The reversal of 64741641641 is 14614614746.

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

It can be written as a sum of positive squares in 2 ways, for example, as 52821369241 + 11920272400 = 229829^2 + 109180^2 .

It is a cyclic number.

It is not a de Polignac number, because 64741641641 - 2²² = 64737447337 is a prime.

It is a Duffinian number.

64741641641 is a modest number, since divided by 641641 gives 64741 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 64741641592 and 64741641601.

It is not an unprimeable number, because it can be changed into a prime (64741641611) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 50499860 + ... + 50501141.

It is an arithmetic number, because the mean of its divisors is an integer number (16210660821).

Almost surely, 2^64741641641 is an apocalyptic number.

It is an amenable number.

64741641641 is a deficient number, since it is larger than the sum of its proper divisors (101001643).

64741641641 is a wasteful number, since it uses less digits than its factorization.

64741641641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101001642.

The product of its digits is 387072, while the sum is 44.

The spelling of 64741641641 in words is "sixty-four billion, seven hundred forty-one million, six hundred forty-one thousand, six hundred forty-one".