7662641543641 has 4 divisors (see below), whose sum is σ = 8757304621312. Its totient is φ = 6567978465972.

The previous prime is 7662641543603. The next prime is 7662641543653. The reversal of 7662641543641 is 1463451462667.

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 not a de Polignac number, because 7662641543641 - 2¹¹ = 7662641541593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7662641543681) 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, 547331538825 + ... + 547331538838.

It is an arithmetic number, because the mean of its divisors is an integer number (2189326155328).

Almost surely, 2^{7662641543641} is an apocalyptic number.

It is an amenable number.

7662641543641 is a deficient number, since it is larger than the sum of its proper divisors (1094663077671).

7662641543641 is a wasteful number, since it uses less digits than its factorization.

7662641543641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1094663077670.

The product of its digits is 17418240, while the sum is 55.

The spelling of 7662641543641 in words is "seven trillion, six hundred sixty-two billion, six hundred forty-one million, five hundred forty-three thousand, six hundred forty-one".